DUAL BAND

CELL PHONE JAMMER

A PROJECT REPORT SUBMITTED IN PARTIAL FULFILLMENT

FOR THIRD YEAR DIPLOMA IN

ELECTRONICS AND TELECOMMUNICATION ENGINEERING

SUBMITTED BY

Afzal Ibrahim

Momin Mujjmil

Khan Mohammed Khalid

Mohsin Khan

PROF. NIYAZ AHMED KHAN

GUIDE

PROF. NIYAZ AHMED KHAN

H. O. D.

(ELECTRONICS AND TELECOMMUNICATION ENGINEERING)

ANJUMAN-I-ISLAM’S

M. H. SABOO SIDDIK POLYTECHNIC 8, Saboo Siddik Polytechnic Road,

Byculla, Mumbai-400008

2013-2014

11509

11512

11520

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ANJUMAN-I-ISLAM’S

M. H. SABOO SIDDIK POLYTECHNIC 8, Saboo Siddik Polytechnic Road, Byculla, Mumbai-400008

CERTIFICATE

This is to certify that the project entitled

DUAL BAND CELL PHONE JAMMER

SUBMITTED BY

Afzal Ibrahim

Momin Mujjmil

Khan Mohammed Khalid

Mohsin Khan

Have satisfactorily completed the same as a partial fulfillment of the project work of the

Diploma in Electronics and Telecommunication Engineering as per the curriculum

specified by M.S.B.T.E. Mumbai during the Academic year 2013-14 for final year diploma

engineering,

Prof. Niyaz Ahmed Khan

(Guide)

Prof. Niyaz Ahmed Khan Prof. Javed Akhtar

(H. O. D.) (Principal)

External Examiner

11509

11512

11520

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Acknowledgement

“EXCUSES ARE THE NAILS USED TO BUILD A HOME OF FAILURE.”

Bearing that very wall in mind and with a high morale we set off to formidable task. When

any project work is undertaken, one thing has to be made sure that it is a complete team effort.

During the on-phase of our innovative and original project we faced some anxious moments,

some very tense ones, and some very euphonic ones; finally we made it to limelight.

A successful project work is the result of teamwork, which contains not only the people who

put their logic, but also who guide them.

We take this opportunity to express our profound gratitude and deep regards to my guide

(Prof. NIYAZ AHMED KHAN) for his exemplary guidance, monitoring and constant

encouragement throughout the course of this thesis. The blessing, help and guidance given by

him time to time shall carry me a long way in the journey of life on which we about to embark.

The most important person whose efforts have been monumental in the completion of

project is our Prof. NAJIB GHATTE for their kind co-operation during the project. He was

generous with their advice, views and ideas, always ensured that we were on right track.

We obliged to staff members of EJ Department, for the valuable information provided by

them in their respective fields. We are grateful for their cooperation during the period of my

assignment.

We experience the inadequacy of words to express the role of MR. MUSHTAQUE

(LAB ASSISTANT) for their guidance tenure here. We are highly grateful to him and for

coordinating with us even after working hours of college.

Lastly, we thank almighty, my family members, and well-wishers for their constant

encouragement without which this assignment would not be possible.

Abstract

This report presents the design, implementation, and testing of a dual-band cell-phone

jammer. This jammer works at GSM 900 and GSM 1800 simultaneously and thus jams the

three well-known carriers in India. This project went through two phases: Phase one: studying

the GSM-system to find the best jamming technique, establishing the system design and

selecting suitable components. Phase two: buying all the needed components, drawing the

overall schematics, fabricating the PCB layout, assembling the devices, performing some

measurements and finally testing the mobile jammer. The designed jammer was successful in

jamming the three carriers in Jordan as will be shown at the end of this report.

Communication jamming devices were first developed and used by military. This interest

comes from the fundamental objective of denying the successful transport of information from

the sender (tactical commanders) to the receiver (the army personnel), and vice-versa.

Nowadays, mobile (or cell) phones are becoming essential tools in our daily life. Here in

Jordan, for example, with a rather low population (around 5 million), three main cell phone

carries are available; namely; the first two use the GSM 900 system, while the third uses the

GSM 1800 system. Needless to say, the wide use of mobile phones could create some problems

as the sound of ringing becomes annoying or disrupting. This could happen in some places like

conference rooms, law courts, libraries, lecture rooms and mosques. One way to stop these

disrupting ringing’s is to install device in such places which will inhibit the use of mobiles, i.e.,

make them obsolete. Such a device is known as cell phone jammer or "GSM jammer", which

is basically some kind of electronic countermeasure device.

i

List of Figures iii

Chapter 1 Introduction 1

1.1

1.1.1

1.1.2

1.1.3

Jamming Techniques

Spoofing

Shielding Attacks

Denial of Service

2

2

2

3

1.2 Design Parameters 3

1.2.1 Distance to be Jammed 3

1.2.2

1.2.3

Frequency Band

Jamming to Signal Ratio

3

3

Chapter 2 Block Diagram 5

2.1 Power Supply 5

2.2 Noise Generator 7

2.3

2.3.1

2.3.2

2.3.3

2.4

Amplifier

Class A Amplifier

Class B Amplifier

Class AB Amplifier

LC Tuned Circuit

8

9

11

12

12

2.5 Transmitting Antenna 15

Chapter 3 Circuit Diagram 16

3.1 Initial Circuit Diagram of Jammer 17

3.2

3.2.1

3.2.2

3.2.3

Modified Circuit Diagram of Jammer

Working of Simulation

Layout of Jammer

Making of Jammer

18

19

20

22

Table of Contents

ii

3.3

3.3.1

Circuit Diagram of Power Supply

Working on Simulation

23

23

3.3.2

3.3.3

Layout of Power Supply

Making and Testing of Power Supply

24

27

Chapter 4 Cell Phone Jammer Specifications 28

4.1

4.2

4.3

4.4

4.5

Chapter 5

Anti-Tracing due to Cell Phone Jammer

Use of Cell Phone Jammer for the children

Cell Phone the reason of Accident

How Cell Phone harmful to Health

Cell Phone Enhance Your Security

Cell Phone Jammer Limitations

29

30

31

31

32

34

Chapter 6 Applications 35

6.1 Class Room. 35

6.2 Conference Room 36

6.3 Hospital 36

6.4 Mosque 36

6.5

6.6

6.7

6.8

6.9

Examination Hall

Bomb Squad

Prison

Library

Military Application

37

38

38

39

39

Chapter 7

Chapter 8

Future Scope

Result Discussion and Conclusion

40

41

References 42

Appendices

iii

List of Figures

Sr. No Figure No. Title of Figure Page No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

1.1

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

3.1

3.2

3.3

3.4

3.5

3.6

3.7

3.8

3.9

3.10

3.11

3.12

3.13

3.14

6.1

6.2

Jamming Concept

Block Diagram

Positive Regulator IC

Step Down Transformer

IC 555 in Astable Mode

Class A Amplifier

Class B Amplifier

LC Tuned Circuit

GSM Antenna

Initial Jammer Circuit Diagram

Modified Jammer Circuit Diagram

Jammer Output on Simulation

PCB Layout of Jammer Circuit

3D View of Jammer Circuit

Making of Jammer Layout on Proteus 8

Making of Jammer Circuit

Circuit Diagram of Power Supply

Power Supply Working on Simulation

PCB Layout of Power Supply

3D View of Power Supply

Making of Power Supply Layout

Making of Power Supply

Testing Power Supply

Class Room Simulation

Exam Hall Simulation

2

5

6

6

7

10

11

13

15

17

18

19

20

20

21

22

23

23

24

24

25

26

27

35

37

1

Chapter 1

Introduction

This report presents the design, implementation, and testing of a dual-band cell-phone

jammer. This jammer works at GSM 900 and GSM 1800 simultaneously and thus jams the

three well-known carriers in India. This project went through two phases:

Phase one: studying the GSM-system to find the best jamming technique, establishing the

system design and selecting suitable components.

Phase two: buying all the needed components, drawing the overall schematics, fabricating

the PCB layout, assembling the devices, performing some measurements and finally testing the

mobile jammer. The designed jammer was successful in jamming the three carriers in India, as

will be shown at the end of this report.

Communication jamming devices were first developed and used by military. This interest

comes from the fundamental objective of denying the successful transport of information from

the sender (tactical commanders) to the receiver (the army personnel), and vice-versa.

Nowadays, mobile (or cell) phones are becoming essential tools in our daily life. Here in

Jordan, for example, with a rather low population (around 5 million), three main cell phone

carries are available; namely; the first two use the GSM 900 system, while the third uses the

GSM 1800 system. Needless to say, the wide use of mobile phones could create some problems

as the sound of ringing becomes annoying or disrupting. This could happen in some places like

conference rooms, law courts, libraries, lecture rooms and mosques. One way to stop these

disrupting ringing is to install device in such places which will inhibit the use of mobiles, i.e.,

make them obsolete. Such a device is known as cell phone jammer or "GSM jammer", which

is basically some kind of electronic countermeasure device.

The technology behind cell phone jamming is very simple. The jamming device broadcasts

an RF signal in the frequency range reserved for cell phones that interferes with the cell phone

signal, which results in a "no network available" display on the cell phone screen. All phones

within the effective radius of the jammer are silenced.

It should be mentioned that cell phone jammers are illegal devices in most countries.

According to the Federal Communications Commission (FCC) in the USA: "The manufacture,

importation, sale, or offer for sale, of devices designed to block or jam wireless

transmissions is prohibited". However, recently, there has been an increasing demand for

portable cell phone jammers. We should mention that this project presented in this report is

solely designed for educational purpose.

2

1.1 Jamming Techniques

There are several ways to jam an RF device. The three most common techniques can be

categorized as follows:

1.1.1 Spoofing

In this kind of jamming, the device forces the mobile to turn off itself. This type is very

difficult to be implemented since the jamming device first detects any mobile phone in a

specific area, then the device sends the signal to disable the mobile phone. Some types of this

technique can detect if a nearby mobile phone is there and sends a message to tell the user to

switch the phone to the silent mode (Intelligent Beacon Disablers).

1.1.2 Shielding Attacks

This is known as TEMPEST or EMF shielding. This kind requires closing an area in a

Faraday cage so that any device inside this cage cannot transmit or receive RF signal from

outside of the cage. This can be as large as a building.

Fig. 1.1 Jamming Concept

3

1.1.3 Denial of Service

This technique is referred to DOS. In this technique, the device transmits a noise signal at

the same operating frequency of the mobile phone in order to decrease the signal-to-noise ratio

(SNR) of the mobile under its minimum value. This kind of jamming technique is the simplest

one since the device is always on. Our device is of this type.

1.2 Design Parameters

Based on the above, our device which is related to the DOS technique is transmitting noise

on the same frequencies of the two bands GSM 900 MHz, and GSM 1.8 GHz (known also as

DCS 1800 band). We focused on some design parameters to establish the device specifications.

These parameters are as follows:

1.2.1 The Distance to be Jammed (D)

This parameter is very important in our design, since the amount of the output power of the

jammer depends on the area that we need to jam. Later on we will see the relationship between

the output power and the distance D. Our design is established upon D=10 meters for DCS

1800 band and D=20 meters for GSM 900 band.

1.2.2 The Frequency Bands

In our design, the jamming frequency must be the same as the downlink, because it needs

lower power to do jamming than the uplink range and there is no need to jam the base station

itself. So, our frequency design will be as follows:

GSM 900 935-960 MHz

GSM 1800 1805-1880 MHz

1.2.3 Jamming to Signal Ratio J/S

Jamming is successful when the jamming signal denies the usability of the communication

transmission. In digital communications, the usability is denied when the error rate of the

transmission cannot be compensated by error correction. Usually, a successful jamming attack

requires that the jammer power is roughly equal to signal power at the receiver (mobile device).

4

The general equation of the jamming-to-signal ratio is given as follows:

Where: Pj=jammer power, Gjr = antenna gain from jammer to receiver, Grj = antenna gain

from receiver to jammer, Rtr = range between communication transmitter and receiver,

Br=communication receiver bandwidth, Lr = communication signal loss, Pt = transmitter

power, Gtr = antenna gain from transmitter to receiver, Grt = antenna gain from receiver to

transmitter, Rjr = range between jammer and communication receiver, Bj = jammer bandwidth,

and Lj = jamming signal loss.

For GSM, the specified system SNR min is 9 dB which will be used as the worst case

scenario for the jammer. The maximum power at the mobile device Pr is -15 dBm.

The technology behind cell phone jamming is very simple. The jamming device broadcasts

an RF signal in the frequency range reserved for cell phones that interferes with the cell phone

signal, which results in a "no network available" display on the cell phone screen. All phones

within the effective radius of the jammer are silenced. It should be mentioned that cell phone

jammers are illegal devices in most countries. According to the Federal Communications

Commission (FCC) in the USA: "The manufacture, importation, sale, or offer for sale, of

devices designed to block or jam wireless transmissions is prohibited". However, recently,

there has been an increasing demand for portable cell phone jammers. We should mention that

this project, presented in this report, is solely done for educational purposes.

There is no intention to manufacture or sell such devices in India, or elsewhere. In this

project, a device that will jam both GSM 900 and GSM 1800 services will be designed, built,

and tested.

This parameter is very important in our design, since the amount of the output power of the

jammer depends on the area that we need to jam. Later on we will see the relationship between

the output power and the distance D. Our design is established upon D=10 meters for DCS

1800 band and D=20 meters for GSM 900 band. Based on the above, our device which is

related to the DOS technique is transmitting noise on the same frequencies of the two bands

GSM 900 MHz, and GSM 1.8 GHz (known also as DCS 1800 band). We focused on some

design parameters to establish the device specifications.

5

Chapter 2

Block Diagram

2.1 Power supply

The proposed design requires a +15 Volts DC Supply.

This is used to supply the other sections with the needed voltages. Any power supply consists

of the following main parts:

2.1.1 Rectification

Rectification is the part use to convert the AC voltage to a DC one. We have two methods

for rectification. A rectified output voltage occurs during both the positive and negative cycles

of the input signal.

2.1.2 The Filter

The Filter is used to eliminate the fluctuations in the output of the full wave rectifier

“eliminate the noise” so that a constant DC voltage is produced. This filter is just a large

capacitor used to minimize the ripple in the output.

Fig. 2.1 Block Diagram.

6

2.1.3 Regulator.

Regulator is used to provide a desired DC-voltage. IC7815 positive voltage regulator is

used. 7805 is a voltage regulator integrated circuit. It is a member of 78xx series of fixed linear

voltage regulator ICs. The voltage source in a circuit may have fluctuations and would not give

the fixed voltage output. The voltage regulator IC maintains the output voltage at a constant

value. The xx in 78xx indicates the fixed output voltage it is designed to provide. 7815 provides

+15V regulated power supply. Capacitors of suitable values can be connected at input and

output pins depending upon the respective voltage levels.

2.1.4 Step Down Transformer

Step down transformer is one whose secondary voltage is less than its primary voltage. It is

designed to reduce the voltage from the primary winding to the secondary winding. This kind

of transformer “steps down” the voltage applied to it’s a step-down unit, the transformer

converts high-voltage, low-current power into low-voltage, high-current power. The larger-

gauge wire used in the secondary winding is necessary due to the increase in current. The

primary winding, which doesn’t have to conduct as much current, may be made of smaller-

gauge wire. Transformer is used to transform the 220VAC to other levels of voltages.

Fig. 2.2 Positive Regulator IC 7815

Fig. 2.3 Step Down Transformer.

7

2.2 Noise Generator using IC 555

In Astable mode, the 555 timer puts out a continuous stream of rectangular pulses having a

specified frequency. Resistor R1 is connected between VCC and the discharge pin (pin 7) and

another resistor (R2) is connected between the discharge pin (pin 7), and the trigger (pin 2) and

threshold (pin 6) pins that share a common node. Hence the capacitor is charged through R1 and

R2, and discharged only through R2, since pin 7 has low impedance to ground during output

low intervals of the cycle, therefore discharging the capacitor in the Astable mode, the

frequency of the pulse stream depends on the values of R1, R2 and C.

An Astable Circuit has no stable state - hence the name "Astable". The output continually

switches state between high and low without any intervention from the user, called a 'square'

wave. This type of circuit could be used to give a mechanism intermittent motion by switching

a motor on and off at regular intervals. It can also be used to flash lamps and LEDs, and is

useful as a 'clock' pulse for other digital ICs and circuits.

Fig. 2.4 IC 555 in Astable Mode.

8

2.3 Amplifier

The essential role of this active element is to magnify an input signal to yield a significantly

larger output signal. The amount of magnification (the "forward gain") is determined by the

external circuit design as well as the active device.

Many common active devices in transistor amplifiers are bipolar junction transistors (BJTs)

and metal oxide semiconductor field-effect transistors (MOSFETs).

Applications are numerous, some common examples are audio amplifiers in a home stereo

or PA system, RF high power generation for semiconductor equipment, to RF and Microwave

applications such as radio transmitters.

Transistor-based amplifier can be realized using various configurations: for example with a

bipolar junction transistor we can realize common base, common collector or common emitter

amplifier; using a MOSFET we can realize common gate, common source or common drain

amplifier. Each configuration has different characteristic.

The term power amplifier is a relative term with respect to the amount of power delivered

to the load and/or provided by the power supply circuit. In general the power amplifier is the

last 'amplifier' or actual circuit in a signal chain (the output stage) and is the amplifier stage

that requires attention to power efficiency. Efficiency considerations lead to the various classes

of power amplifier based on the biasing of the output transistors or tubes: see power amplifier

classes.

An electronic amplifier, amplifier, or (informally) amp is an electronic device that increases

the power of a signal. It does this by taking energy from a power supply and controlling the

output to match the input signal shape but with a larger amplitude. In this sense, an amplifier

modulates the output of the power supply.

There are four basic types of electronic amplifier: the voltage amplifier, the current

amplifier, the trans-conductance amplifier, and the trans-resistance amplifier. A further

distinction is whether the output is a linear or nonlinear representation of the input. Amplifiers

can also be categorized by their physical placement in the signal chain.

Voltage amplifier – This is the most common type of amplifier. An input voltage is

amplified to a larger output voltage. The amplifier's input impedance is high and the output

impedance is low.

Current amplifier – This amplifier changes an input current to a larger output current. The

amplifier's input impedance is low and the output impedance is high.

Trans-conductance amplifier – This amplifier responds to a changing input voltage by

delivering a related changing output current.

9

2.3.1 Class A Amplifier

Amplifying devices operating in class A conduct over the entire range of the input cycle. A

class-A amplifier is distinguished by the output stage devices being biased for class A

operation. Subclass A2 is sometimes used to refer to vacuum-tube class-A stages where the

grid is allowed to be driven slightly positive on signal peaks, resulting in slightly more power

than normal class A where the grid is always negative, but this incurs a higher distortion level.

Class-A designs are simpler than other classes; for example class-AB and class-B designs

required two connect devices in the circuit (push–pull output), each to handle one half of the

waveform; class A can use a single device (single-ended).The amplifying element is biased so

the device is always conducting, the quiescent (small-signal) collector current (for transistors;

drain current for FETs or anode/plate current for vacuum tubes) is close to the most linear

portion of its trans conductance curve. Because the device is never 'off' there is no "turn on"

time, no problems with charge storage, and generally better high frequency performance and

feedback loop stability (and usually fewer high-order harmonics). The point at which the device

comes closest to being 'off' is not at 'zero signal', so the problems of crossover distortion

associated with class-AB and -B designs is avoided.

Class-A amplifiers are inefficient. A theoretical efficiency of 50% is obtainable with

transformer output coupling and only 25% with capacitive coupling, unless deliberate use of

nonlinearities is made (such as in square-law output stages). In a power amplifier, this not only

wastes power and limits operation with batteries, but increases operating costs and requires

higher-rated output devices. Inefficiency comes from the standing current that must be roughly

half the maximum output current, and a large part of the power supply voltage is present across

the output device at low signal levels. If high output power is needed from a class-A circuit,

the power supply and accompanying heat becomes significant. For every watt delivered to the

load, the amplifier itself, at best, uses an extra watt. For high power amplifiers this means very

large and expensive power supplies and heat sinks.

Class-A power amplifier designs have largely been superseded by more efficient designs,

though they remain popular with some crossover distortion and reduced odd-harmonic

hobbyists, mostly for their simplicity. There is a market for expensive high fidelity class-A

amps considered a "cult item" amongst audiophiles mainly for their absence of and high-order

harmonic distortion.

10

The most commonly used type of power amplifier configuration is the Class A Amplifier.

The Class A amplifier is the most common and simplest form of power amplifier that uses the

switching transistor in the standard common emitter circuit configuration as seen previously.

Transistor is always biased “ON” so that it conducts during one complete cycle of the input

signal waveform producing minimum distortion and maximum amplitude to the output.

This means then that the Class-A Amplifier configuration is the ideal operating mode,

because there can be no crossover or switch-off distortion to the output waveform even during

the negative half of the cycle. Class A power amplifier output stages may use a single power

transistor or pairs of transistors connected together to share the high load current. Consider the

Class-A amplifier circuit below. This is the simplest type of Class A power amplifier circuit. It

uses a single-ended transistor for its output stage with the resistive load connected directly to

the Collector terminal. When the transistor switches “ON” it sinks the output current through

the Collector resulting in an inevitable voltage drop across the Emitter resistance thereby

limiting the negative output capability .The efficiency of this type of circuit is very low and

delivers small power outputs for a large drain on the DC power supply.

A Class A amplifier stage passes the same load current even when no input signal is applied

so large heat sinks are needed for the output transistors. However, another simple way to

increase the current handling capacity of the circuit while at the same time obtain a greater

power gain is to replace the single output transistor with a Darlington Transistor.

Fig. 2.5 Class A Amplifier

11

These types of devices are basically two transistors within a single package, one small

“pilot” transistor and another larger “switching” transistor. The big advantage of these devices

are that the input impedance is suitably large while the output impedance is relatively low,

thereby reducing the power loss and therefore the heat within the switching device.

2.3.2 Class B Amplifier

Class-B amplifiers only amplify half of the input wave cycle, thus creating a large amount

of distortion, but their efficiency is greatly improved and is much better than class A. Class-B

amplifiers are also favoured in battery-operated devices, such as transistor radios. Class B has

a maximum theoretical efficiency of π/4 (≈ 78.5%). This is because the amplifying element is

switched off altogether half of the time, and so cannot dissipate power. A single class-B

element is rarely found in practice, though it has been used for driving the loudspeaker in the

early IBM Personal Computers with beeps, and it can be used in RF power amplifier where the

distortion levels are less important. However, class C is more commonly used for this.

Fig. 2.6 Class B Amplifier

A practical circuit using class-B elements is the push–pull stage, such as the very simplified

complementary pair arrangement shown below. Here, complementary or quasi-complementary

devices are each used for amplifying the opposite halves of the input signal, which is then

recombined at the output. This arrangement gives excellent efficiency, but can suffer from the

drawback that there is a small mismatch in the cross-over region – at the "joins" between the

two halves of the signal, as one output device has to take over supplying power exactly as the

other finishes. This is called crossover distortion. An improvement is to bias the devices so

they are not completely off when they're not in use. This approach is called class AB operation.

12

2.3.3 Class AB Amplifier

Class AB is widely considered a good compromise for audio power amplifiers, since much

of the time the music is quiet enough that the signal stays in the "class A" region, where it is

amplified with good fidelity, and by definition if passing out of this region, is large enough that

the distortion products typical of class B are relatively small. The crossover distortion can be

reduced further by using negative feedback.

In class-AB operation, each device operates the same way as in class B over half the

waveform, but also conducts a small amount on the other half. As a result, the region where

both devices simultaneously are nearly off (the "dead zone") is reduced. The result is that when

the waveforms from the two devices are combined, the crossover is greatly minimised or

eliminated altogether. The exact choice of quiescent current, the standing current through both

devices when there is no signal, makes a large difference to the level of distortion (and to the

risk of thermal runaway, that may damage the devices); often the bias voltage applied to set

this quiescent current has to be adjusted with the temperature of the output transistors (for

example in the circuit at the beginning of the article the diodes would be mounted physically

close to the output transistors, and chosen to have a matched temperature coefficient). Another

approach (often used as well as thermally tracking bias voltages) is to include small value

resistors in series with the emitters.

Class AB sacrifices some efficiency over class B in favour of linearity, thus is less efficient

(below 78.5% for full-amplitude sine waves in transistor amplifiers, typically; much less is

common in class-AB vacuum-tube amplifiers). It is typically much more efficient than class

A.

2.4 LC Tuned Circuit

In electronics an LC circuit, also called a resonant circuit, tank circuit, or tuned circuit,

consists of two electronic components connected together; an inductor, represented by the letter

L, and a capacitor, represented by the letter C. The circuit can act as an electrical resonator, an

electrical analogue of a tuning fork, storing energy oscillating at the circuit's resonant

frequency.

LC circuits are used either for generating signals at a particular frequency, or picking out a

signal at a particular frequency from a more complex signal. They are key components in many

electronic devices, particularly radio equipment, used in circuits such as oscillators, filters,

tuners and frequency mixers.

13

An LC circuit is an idealized model since it assumes there is no dissipation of energy due to

resistance. Any practical implementation of an LC circuit will always include loss resulting

from small but non-zero resistance within the components and connecting wires. The purpose

of an LC circuit is usually to oscillate with

minimal damping, so the resistance is made

as low as possible. While no practical

circuit is without losses, it is nonetheless

instructive to study this ideal form of the

circuit to gain understanding and physical

intuition. For a circuit model incorporating

resistance.

If a charged capacitor is connected

across an inductor, charge will start to flow

through the inductor, building up a

magnetic field around it and reducing the voltage on the capacitor. Eventually all the charge on

the capacitor will be gone and the voltage across it will reach zero. However, the current will

continue, because inductors resist changes in current.

The energy to keep it flowing is extracted from the magnetic field, which will begin to

decline. The current will begin to charge the capacitor with a voltage of opposite polarity to its

original charge. When the magnetic field is completely dissipated the current will stop and the

charge will again be stored in the capacitor, with the opposite polarity as before. Then the cycle

will begin again, with the current flowing in the opposite direction through the inductor.

The charge flows back and forth between the plates of the capacitor, through the inductor.

The energy oscillates back and forth between the capacitor and the inductor until (if not

replenished by power from an external circuit) internal resistance makes the oscillations die

out. Its action, known mathematically as a harmonic oscillator, is similar to

a pendulum swinging back and forth, or water sloshing back and forth in a tank. For this reason

the circuit is also called a tank circuit. The oscillation frequency is determined by the

capacitance and inductance values. In typical tuned circuits in electronic equipment the

oscillations are very fast, thousands to millions of times per second.

The resonance effect occurs when inductive and capacitive reactance are equal in

magnitude. The frequency at which this equality holds for the particular circuit is called the

resonant frequency.

Fig. 2.7 LC Tuned Circuit

14

Where L is the inductance in Henry, and C is the capacitance in Farads. The angular

frequency ω0, has units of radians per second.

The equivalent frequency in units of hertz is

LC circuits are often used as filters; the L/C ratio is one of the factors that determines their

"Q" and so selectivity. For a series resonant circuit with a given resistance, the higher the

inductance and the lower the capacitance, the narrower the filter bandwidth. For a parallel

resonant circuit the opposite applies. Positive feedback around the tuned circuit

("regeneration") can also increase selectivity.

Stagger tuning can provide an acceptably wide audio bandwidth, yet good selectivity. The

most common application of tank circuits is tuning radio transmitters and receivers. For

example, when we tune a radio to a particular station, the LC circuits are set at resonance for

that particular carrier frequency.

The charge flows back and forth between the plates of the capacitor, through the inductor.

The energy oscillates back and forth between the capacitor and the inductor until (if not

replenished by power from an external circuit) internal resistance makes the oscillations die

out. Its action, known mathematically as a harmonic oscillator, is similar to

a pendulum swinging back and forth, or water sloshing back and forth in a tank. For this reason

the circuit is also called a tank circuit. The oscillation frequency is determined by the

capacitance and inductance values. In typical tuned circuits in electronic equipment the

oscillations are very fast, thousands to millions of times per second.

An LC circuit is an idealized model since it assumes there is no dissipation of energy due to

resistance. Any practical implementation of an LC circuit will always include loss resulting

from small but non-zero resistance within the components and connecting wires. The purpose

of an LC circuit is usually to oscillate with minimal damping, so the resistance is made as low

as possible. While no practical circuit is without losses, it is nonetheless instructive to study

this ideal form of the circuit to gain understanding and physical intuition. For a circuit model

incorporating resistance, if a charged capacitor is connected across an inductor, charge will

start to flow through the inductor, building up a magnetic field around it and reducing the

voltage on the capacitor.

15

2.5 Transmitting Antenna

A proper antenna is necessary to transmit the jamming signal. In order to have optimal

power transfer, the antenna system must be matched to the transmission system. In this project,

we used two 1/4 wavelength monopole antennas, with 50 Ω input impedance so that the

antennas are matched to the system. We used monopole antenna since the radiation pattern is

Omni-directional. Fig. 2.8 shows the DCS 1800 antenna and GSM 900 antenna respectively.

Specifications:

Frequency: 1700-1900MHz

Input impedance 50Ω

Specifications:

Frequency: 850MHz-1GHz

Input impedance 50Ω

Fig. 2.8 GSM Antenna

16

Chapter 3

Circuit Diagram

A “Cell Jammer” is just way of saying “Dirty Transmitter” which happens to transmit within

the Cellular Phone Bands. Reality is, the dirtier the better. The mobile phone is working under

a certain range of frequency and linking with the base station through radio wave. The data and

sound is transmitted by the means of baud rate and modulation. In the light of the principle of

communication, the cell phone Jammer makes the unrecognizable code interference when the

mobile phone is receiving the information. Communication jamming devices were first

developed and used by military. This interest comes from the fundamental objective of denying

the successful transport of information from the sender (tactical commanders) to the receiver

(the army personnel), and vice-versa. Nowadays, mobile (or cell) phones are becoming

essential tools in our daily life. Here in Jordan, for example, with a rather low population

(around 5 million), three main cell phone carries are available; namely; the first two use the

GSM 900 system, while the third uses the GSM 1800 system. Needless to say, the wide use of

mobile phones could create some problems as the sound of ringing becomes annoying or

disrupting. This could happen in some places like conference rooms, law courts, libraries,

lecture rooms and mosques. One way to stop these disrupting ringing is to install device in such

places which will inhibit the use of mobiles, i.e., make them obsolete. Such a device is known

as cell phone jammer or "GSM jammer", which is basically some kind of electronic

countermeasure device. The mobile phone will fail to link with the base station as it can’t check

out the correct data from base station. The forming of the magnetic shielding leads the failure

to receive and make calls in the certain area. The 555 timer [8 pin] IC simply makes a noise.

It’s coupled via C4 [electrolytic] to modulate the MRF transistor oscillator. With C1 set at

roughly 1/3rd, you will be close to 900 MHz’s by sweeping the C1 trimmer capacitor, you can

swing the output frequency from 800 MHz to 2 GHz with the transistor and values shown. You

could replace the 555 chip with an electret microphone and listen to yourself talk on a scanner,

so the unit could easily couple as a UHF Bug. Instead of a single Tapped Coil, I’ve used two

moulded inductors for ease of construction. Values for C1, C2, L1, and L2 are critical for the

frequency range. You might want to build the unit into a metal box, add an on/off switch in the

batteries + line, and maybe even add a LED. Connect an old 800 MHz cell phone antenna to

the capacitor C5.

17

3.1 Initial Circuit Diagram

This was the initial circuit diagram which we get from internet, its gives us 900mhz

frequency noise signal on simulation .But as we want to build dual band cell phone jammer ,

so we have modified the circuit to get dual band frequency signal.

First band = 900 MHz

Second band = 1.8 GHz

Fig. 3.1 Initial Jammer Circuit Diagram

18

3.2 Modified Circuit Diagram

Fig

. 3

.2 M

od

ifie

d J

am

mer

Cir

cuit

Dia

gra

m

19

3.2.1 Working on Simulation

Fig

. 3

.3 J

am

mer

Ou

tpu

t o

n S

imu

lati

on

.

20

3.2.2 Layout Made on Proteus 8 Software

Fig. 3.5 3D View of jammer circuit

Fig. 3.4 PCB Layout of Jammer Circuit

21

Fig. 3.6 Making of Jammer Layout on Proteus 8

22

3.2.3 Making of Jammer

Fig. 3.7 Making of Jammer Circuit

23

3.3 Circuit Diagram of Power Supply.

Fig. 3.9 Power Supply Working on Simulation

3.3.1 Working on Simulation.

Fig. 3.8 Circuit Diagram of Power Supply.

24

3.3.2 Layout of Power Supply made on PROTEUS 8

Fig. 3.10 PCB Layout of Power Supply

Fig. 3.11 PCB 3D of Power Supply

25

Fig

. 3

.12

Ma

kin

g o

f P

ow

er S

up

ply

La

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on

Pro

teu

s 8

26

Fig. 3.13 Making of Power Supply

27

3.3.3 Making and Testing of Power Supply

Fig. 3.14 Testing of Power Supply Circuit.

28

Chapter 4

Cell Phone Jammer Specifications

For many of us, cell phones are making our busy life much easier. We can get in touch with

the classmate that lives far away, the business partners abroad and even get rid of the boring

meeting by sending messages to an available friend. However, despite of the wide spread use

of cell phones, the call for some devices to jam the cell phone signals is also increasing. For

example, cheating in the examination via phone is becoming frequent, the risks of information

leakage via cell phone conversation is surprisingly high, thus the companies, schools and etc.

are in need of something that can help them out of the difficulty. Thus the cell phone jammer

is coming into being.

With the cell jammer on, the signal transmission and reception between the caller and

receiver fails. In that case, cell phone jammer can assist the users putting an end to the undesired

noises generated by the phone calls. Also the staff can be more devoted to the customers than

their cell phones. The cell phone jamming device also helps to reduce the chances of explosion

in the oil and petro station caused by the use of cell phone. It also can create a fair competitive

environment for the examiners that sit a vital test by blocking the radio wave signals. Besides

the civilian use, it is also of great use to the military in aiding the officers to intercept the

messages from criminals and terrorists.

As far as we understand all of the new goods have their peculiarities, such as the mobile

phone jamming devices. As a new thing in our society nowadays, mobile phone jammers are

extremely well-known for us. Discussing its chief feature, it takes us so many advantages, but

what are the advantages and what are they utilized for? Here in this text I will enumerate for

you one after another.

The advantage for the businessman is that the greatest part of the time, the businessman is

so occupied, they are occupied for going errands, they are occupied for organizing the business,

and in addition they are occupied for attending the encounter. When they are having an

encounter, they are speaking and talking about the significant things for their business.

Certainly, they expect that they are not irritated by the others; they hope they may receive their

encounter continuing well. But for the business item, they may not switch their cell phone off,

what should they undertake? The Wi-Fi jammer may aid you in such a situation.

The advantage for the lovers: after the crazy working day, we may have the relaxing time;

it is a small time period we cannot get together with our beloved ones as we are occupied for

our job.

29

Nowadays we are willing to be with our lovers, and don't wish the others to interrupt us, but

some exclusive time, the people such as your chief ordered you not to switch your cell phone

off. What could you do? You may go to buy a mobile phone jamming device; it will figure out

your problem.

The advantage for the good mates: it's a long time that we may get an event for all the best

mates, we are glad for the event, the same that we do not wish the others to interrupt our

excellent party, how may I solve this problem? You may purchase a mobile phone jammer to

aid you for this.

The advantage for the perfect gift and the commercial affairs: for some nice days, some

folks always cannot choose the perfect thing as a present for their best friends or beloved ones.

Here I may tell you that the mobile phone jamming devices are extremely good presents for

your friends and relatives. You may purchase them for your parents, you may buy them for

your mates, and you may purchase them for your wife or husband and so on. The greatest part

of the people may utilize this for their own usage. As more and more folks utilize this mobile

jammer, and the mobile phone jamming devices are the good presents, certainly, they are

extremely active in the market currently, you may go to buy for the mobile phone jammer

selling, I think perhaps you may get a huge money. And somebody can purchase it mobile

phone jamming device business; I think it is in addition a good way to make the advantages. A

great deal of the mobile phone jamming device business get into the market and arrive into a

new scene for us.

4.1 Anti-Tracking Due to Cell Phone Jammer

Tracking has risen to be the hot topic in this modern society. Various kinds of tracking

devices will create different kinds of surprises. Some of them are funny, some of them are

miserable, if you are lucky enough to be the meat of one tiger, please be careful about the life

around you. You’d better to prepare a GPS jammer to block all tracking accidents away.

The fact is as the widely applying of GPS technology, the GPS tracking movements has

stepped into everyone’s daily life. We can install the tracking instrument in our house to

observe everything happened in your home, your favourite decorations, your pets, even your

children, etc. Some couples who are lacking of beliefs with each other, the wife is worried

about the charms of their husbands to attract more beauties, while the husband hopes to know

everything about his another side. The first weapon they choose will be the GPS tracking

equipment’s.

30

In fact, they are doing things out of love, but there still many evil guys who are tending to

earn more profits out of bad purposes. They often choose some famous stars or successful men

to be their targets. If you are suffering with the being tracked life now, fighting with it under

the help of a GPS jammer is your wise choice then.

In early times, the GPS is mainly used in wars. With it, the enemy’s position will be recorded

correctly which is really benefited for your explosion plan. As time goes on, more and more

civilian uses of it has appeared, the most popular one is that GPS systems have been installed

on cars especially Great Britain due to the system’s reliable navigation feature. This navigation

tool is very useful for new drivers to guide them while they drive to their desired destinations.

Also a GPS system can aid drivers to seek detours away from paths with heavy traffic. Of

course we couldn’t deny its advantages, but still we need to look at its negative side too. So the

GPS jammer will make the GPS technology be a perfect thing in the human’s history.

The GPS jammer is effective in disabling all kinds of GPS tracking gadgets. Just turn on the

jammer if you are sick of tracked life, turn is off when you don’t need it. Easy to conceal and

convenient to install, to be the best of the best, here wide range of GPS jammers will meet your

every need.

Want to get the idealist one for your convenient life or the private life you don’t want to

know by others? Then pay attention to the category list here. Believe that you can get a

satisfying product with a reasonable price. In a word, buy more, save more! We assure you the

best service and fast shipping.

4.2 For Children Use Cell Phone Jammer

Perhaps you think that the popularity of cell phones enables you to stay in touch with both

of your boss and family members and makes the communication convenient. Both your career

and your life will thus be promoted. Actually, it is the other way around.

If you want to have a happy time with your children, you’d better not pick up the phone

calls from your boss or client. Of course, switching off the cell phone seems to be an offense

to him. A cell jammer helps to sort out of the problem. Once the cell phone jammer is turned

on, the caller on the other side would think that there is a bad reception of phone signals around

you, unaware that you avoid them purposely.

Sounds fantastic, right? The children cannot bear the fact that they are being ignored by

their parents. For the sound growth of your kids, jam all the cell phone calls.

31

4.3 Cell Phone: The Reason of Accident

The bureau kept out of public view very many pages of investigation and cautions about the

risks of driving while utilizing mobile phones. The Government had guided a long-term

research of 10,000 chauffeurs to speak to the security risk of utilizing mobile telephones while

driving in 2003. Although the research was never terminated.

Although it was beginning to demonstrate that mobile phone usage was an important factor

in traffic disasters. It looked like the roadway security bureau evaluated that mobile phone

usage by chauffeurs caused about 955 deaths and 240,000 disasters in 2002. But the data

appeared to demonstrate that it was not just drivers holding a mobile phone that was causing

the disasters but in fact speaking on the cell phone, hands-free or not.

“What the authorities knew is that speaking and driving is exactly as bad as drunk driving,”

commented Clarence Ditto, executive head of the Centre for Auto Security. "It does not matter

whether it is portable or hands-free, it is the distraction of speaking to somebody other, the talk

itself that results in the inattention that guides to accidents, injuries and deaths."

The roadway security bureau did a one-year research of 100 chauffeurs in which cams were

located inside their automobiles to display their driving habits. That research concluded that

chauffeurs speaking with portable tools while driving were at 1.3 times bigger risk of a disaster,

while those who were dealing were at 3 times bigger endanger, than non-cell-phone-using

chauffeurs.

In order to stop numerous crashes because of the speaking on cell phones while driving the

mobile signal jammers are used. Cell phone jammers can be installed anywhere.

4.4 How Cell Phone Influence our Health?

As we are becoming more and more fond of mobile telephones there stays the open question

of what influence these mobile telephones have on our wellbeing and health. Some late

researches in Switzerland have some useful information about this.

Our reliance on and investing in mobile telephones rise all the time. The yearly sale of

mobile phones is reaching 1 billion devices. Is the result of all the accompanying

electromagnetic waves going to have an influence on our wellbeing? Nearly everybody knows

some 'anecdotal proof' where there have been some negative influence on people: migraine,

concentration troubles, insomnia, irritability, etc. But, may anything be told on a scientific

rudiments? Some late investigation from Switzerland has some useful info on this subject.

32

The subject is hard in itself and made harder by the huge economic interests engaged.

Perfectly, in a cold, scientific test, one ought to find a group of people, several of whom would

be exposed to the electromagnetic waves created by mobile telephones and the base stations

for a few years and several of whom in the committee would not be subjected. All of them

would be unaware of exposure and they'd not vary regarding other elements influencing their

wellbeing. One could cautiously measure their wellbeing state and their health, differentiating

between those subjected and those not subjected. Evidently this has not been done nor will it

be done after.

It is evident that cell phones have a negative influence on our health. But what can we do?

We can protect ourselves and our children, parents, beloved ones with the help of the

devices named phone jammers. Mobile jammers are tools used to block mobile phones

radiation and thus protect people from the harmful influence of radio waves. Cell jammers are

very helpful in plenty of situations in everyday life. If you have a portable cell phone jammer

you don’t need to worry about radiation.

4.5 Cell Phone Jammer Enhance your Security

With the rapid development of the communication technology, the mobile phone is widely

used in the world. While the mobile phone brings great conveniences to people, it also raises

new challenge on the security of confidential work. In recent years, the wiretap, cheating in

examination, medical negligence and gas station explosion with mobile phone occurred and it

has aroused great concern of the society. Maybe it’s one of the reasons that promoted the

appearance of cell phone Jammer.

The cell phone jammer is designed to be applied in the examination hall, school campus,

gas station, church, court, library, conference centre, theatre, hospital and government,

financial, prison, police and military sit Under the protection of cell phone jammer, you needn’t

to worry too much about the information security and explosion in gas station caused by the

cell phone. You can speak in the meeting room at ease and feel relax in a gas station. E such

kind of mobile phone prohibited places.

Mobile telephones are extremely useful for communication nevertheless at instances they

turn into a huge headache for us and we wish we could control its work or avoid mobile phone

calls without turning it off in order that the callers do not understand that someone is making a

try to avoid their phone calls.

33

When we switch off the cell phone the caller comes to know the cell phone has been turned

off nevertheless we all the time wish that after we turn off the cell phone, the caller should not

understand it’s really turned off to phone calls.

The answer for this problem may be got by having a cell phone jamming device. A mobile

phone jammer will allow you to block the frequency of your cell service provider no matter

where you go and you'll not ever have to turn off your mobile telephone to avoid phone calls

and your caller will receive automated voice message from his service provider that the cell

phone subscriber is out of covering region. Phone signal jammer is extremely useful if you end

up driving on a much occupied freeway so to concentrate on driving to avoid disaster while

talking on the cell phone. Cell phone jammer is useful on an event or a disco as a result in such

situations you want to avoid phone calls and revel in the time without receiving some stupid

phone calls from your chief or from house calling you urgently back.

While the mobile phone brings us great conveniences, it also results in bad effects in some

special occasions such as prison and jail. In consideration of the public safety, it’s necessary to

restrict people’s wireless telecommunication. And the cell phone jammers just come to take

the importance role.

Now in the case that no obvious effects to post a notice ,some hospitals, gas stations and

theatres install the cell phone jammers to solve the problem of the interference to medical

electronic equipment’s, the hidden danger of the equipment’s in gas station and so on.

However, the restriction of cell phone arises the disagreements from cell phone users. They

believe the cell phone jammer infringe the civil telecommunication rights.

34

Chapter 5

Cell Phone Jammer Limitation

With the cell jammer on, the signal transmission and reception between the caller and

receiver fails. In that case, cell phone jammer can assist the users putting an end to the undesired

noises generated by the phone calls. Also the staff can be more devoted to the customers than

their cell phones. The cell phone jamming device also helps to reduce the chances of explosion

in the oil and petro station caused by the use of cell phone. It also can create a fair competitive

environment for the examiners that sit a vital test by blocking the radio wave signals. Besides

the civilian use, it is also of great use to the military in aiding the officers to intercept the

messages from criminals and terrorists.

However, it is still can be seen that cell phone jammer is in places that are less dangerous

and threatening, and thus makes the life difficult for the phone users. It is not unusual to hear

the customers complain that they have to resort to the phone of the restaurant due to the

interruption of the signal, for the boss wants to increase their phone income with the application

of cell phone jamming devices. Besides, for the cell phone jammer will block all the signals

within its working range, there may be grave consequences in an emergency. And even it may

be utilized by the criminals to take advantage of others. As it is reported in the newspaper,

because of the blocking device equipped in the car, a girl who was raped by a taxi driver could

not make an emergency call and led to her death. In regard of safety and emergency, the cell

phone jammer are prohibited to use in most countries and the lawbreakers will be given severe

penalty. Before buying a cell phone jammer, you’d better think twice. Does the advantages

really outweigh the disadvantages? Is it really appropriate to use in your conditions? It is

necessary for you to seek some advice from friends or authorities so that you can make the

wise choice. Traditional another disadvantage is that, when a 4g cell phone jammer people use

mobile phone, mobile phone jammers will still take the interference signal, it takes a lot of

energy and not smart. For this reason, we would like to know if there are any smart& eco-

friendly mobile phone jammers, can generate small radiation and began to work only when

they feel from the mobile phone signal. Most of the best portable cell phone jammer will be

placed in public places, such as schools, library and conference room. They promised us a quiet

environment in these areas, but how much radiation they are really terrible .Jammers are

thought to become illegal his or her misuse is simple. The cell phone signal jammer prevents

people from making emergency calls too.

35

Chapter 6

Application

6.1 Use of Cell Phone Jammer in Class Room

Fig. 6.1 Classroom Simulation

36

Nowadays as the cell phone becomes so popular and handy, everyone has their own cell

phone. Evens kids also have the latest cell phone available in the market. Even though teachers

have more knowledge than student, but student are smarter than teacher in using technology.

Today cell phone are widely used in classroom, for chatting, surfing net. Etc.

During lectures also the students are using cell phone, which reduced their concentration

towards lecture, and when some cell phone rings during lecture, it will disturb the whole class.

To avoid this a cell phone jammer can be used in classroom. In the international schools and

colleges cell phone jammer have used, in specific area and time to avoid any interruption during

lectures , and to be focused towards study.

6.2 Use of Cell Phone Jammer in Conference Room

Use of cell phone is not allowed in conference room. If in any serious meeting, or in

conference room if your cell phone rings up, it’s very awkward movement. And it’s difficult

to face your boss.

And if your boss and you don’t want your employee to use their cell phone during work

time, then the only way is to use a cell phone jammer.

6.3 Use of Cell Phone Jammer in Hospital

In hospital it is clearly written to keep their cell phone silent, but many people doesn’t follow

it, and the terrible ringtone make the patient disturb? During any operation or surgery it is very

important to keep the phone off, as can reduced the concentration towards surgery which make

risk the life of patient.

Also the phone signals frequency can interrupt with the machines like brain scanner, CT

scan, X-RAY which can disturb the process. Hence cell phone should be used to avoid it.

6.4 Use of Cell Phone Jammer in Mosque

Mosques are the example of the places where the mobile jammer will be a great solution.

Although mosques people politely ask people before prayer to disable their cell phone, some

people forget and ringing of their phone is very annoying during prayer.

37

6.5 Use of Cell Phone Jammer in Examination Hall

As the technology has vastly developed, cheating ways are also on their top. Some students

cheat with the help of their smartphone, during exam. To avoid this a cell phone jammer must

be placed in examination centre.

Fig. 6.2 Exam Hall Simulation

38

6.6 Use of Cell Phone Jammer in Bomb Squad

Cell phone jamming devices were originally developed for law enforcement and the military

to interrupt communications by criminals and terrorists. The bombs that blew up commuter

trains in Spain in March 2004, as well as blasts in Bali in October 2002 and Jakarta in August

2003, all relied on cell phones to trigger explosives. It has been widely reported that a cell-

phone jammer thwarted an assassination attempt on Pakistani President Musharraf in

December 2003. When President Bush visited London in November 2004, it was reported that

British police considered using jammers to protect the president's motorcade through London.

During a hostage situation, police can control when and where a captor can make a phone

call. Police can block phone calls during a drug raid so suspects can't communicate outside the

area. Cell-phone jammers can be used in areas where radio transmissions are dangerous, (areas

with a potentially explosive atmosphere), such as chemical storage facilities or grain elevators.

The TRJ-89 jammer from Antenna System & Supplies Inc. carries its own electrical generator

and can block cellular communications in a 5-mile (8-km) radius.

Corporations use jammers to stop corporate espionage by blocking voice transmissions and

photo transmissions from camera phones. On the more questionable end of the legitimacy

spectrum, there are rumours that hotel chains install jammers to block guests' cell-phone usage

and force them to use in-room phones at high rates.

6.7 Use of Cell Phone Jammer in Prison

It is well known fact that in the 21th century prisons all over the world faced the new

problem-cell phone jammer.

Today when the cellular phone is smart like a laptop and small like a box of matches it has

become necessary gadget for inmates. Criminals rule their business from inside the prison,

coordinate their efforts to escape, interfere investigation process and get all the relevant info

online. Phantom Technologies LTD provides wide range of different jamming devices which

create "free cellular space" inside the prison and prevent any possible cellular traffic.

Our state-of- art technology implemented provides effective and reliable jamming of the

whole compound. After sight-survey provided our technical engineers calculate the required

output power and the quantity of devices needed for the concrete object. After final calibration

of the antennas no cellular calls would be possible inside of the compound. Moreover there is

a number of jamming options that can be supplied.

39

6.8 Use of Cell Phone Jammer in Library

In library as the cell phone is not allowed, ringing of phone can disturb the library

atmosphere and also the student which studious towards there study get distracted due to cell

phone. Hence, cell phone jammer must be a great solution.

6.9 Use of Cell Phone Jammer in Military

Danger room has an awesomely comprehensive look at all the cell phone jammers the US

military used during the Iraq War. Those jammers proved incredibly important in stripping

insurgents of their most powerful weapon—the IED.

The US government has spent $17 billion buying 50,000 jammer units with fantastic names

like Warlock Green, Warlock Red, Warlock Duke, Acorn, and more. But in the beginning of

the war, there was a little bit of a cat and mouse game between radio-frequency jammers and

IEDs and jammers were far behind. They were too slow, they couldn't adapt as well and they

could only offer protection of only a few yards. Hell, occasionally two jammers would lock

onto each other and cancel one another out.

The Navy sent to Iraq hundreds of electronic warfare specialists, to bring the cacophony

produced by 14 kinds of jammers into some sort of harmony. Protocols were established, to

allow one device to send its signal and then go silent for a few milliseconds, so another gadget

could broadcast; that allowed Warlock Red and Warlock Green to be packaged into a single,

combination unit...The intelligence specialists at the Combined Explosive Exploitation Cells

got faster and faster at analysing which frequencies the insurgents were using. That, in turn,

allowed the jammers to be updated more quickly, so they could counter emerging threats.

A new generations of jammers were introduced too, they could cover a broad range of

frequencies and perform specific "set-on" jamming which mean that "rather than confuse a

receiver with a modified version of its own signal, Duke had a series of built-in jamming

responses, designed to fool very specific devices." And as jammers got better, the insurgents

in Iraq largely abandoned the use of IEDs and deaths from IEDs dropped.

However, IEDs are still a serious problem in the rest of the world so defence manufacturers

are ramping up even newer technologies to combat them. It's basically going to be a brand new

cat and mouse game. Read the entire excellent report at Wire’s Danger Room.

40

Chapter 7

Future Scope

The jammer we have made works on 15Vdc, and its range is about 10ft.Its range can be

increased, by increasing its power transmission capability. We have used two GSM antenna,

by using more numbers of antenna its range can also be further increased. It can be design in

such a way that to block 4g signal also, as this jammer is unable to block 4g signal.

The traditional were too slow, they couldn't adapt as well and they could only offer

protection of only a few yards. Hell, occasionally two jammers would lock onto each other and

cancel one another out. A new generations of jammers were introduced too, they could cover

a broad range of frequencies and perform specific "set-on" jamming which mean that "rather

than confuse a receiver with a modified version of its own signal, Duke had a series of built-in

jamming responses, designed to fool very specific devices." And as jammers got better, the

insurgents in Iraq largely abandoned the use of IEDs and deaths from IEDs dropped. However,

IEDs are still a serious problem in the rest of the world so defence manufacturers are ramping

up even newer technologies to combat them. It's basically going to be a brand new cat and

mouse game. Read the entire excellent report at Wire’s Danger Room.

Jammer can be used in religious places like mosque, temple, and church. And in school,

colleges, conference room, theatre, shopping malls as they are legal and allowed to use cell

phone jammer in such place in India according to the Indian rule.

Jammer is widely used and it is initially developed for military purposes only, it’s developed

during Second World War. It can be used to avoid bomb triggering via cell phone, and to avoid

cell phone radiation in places like gas station or any hazardous places. It is also should be in

classroom, so that the children will be more focused on studies rather than surfing net on their

cell phone.

41

Chapter 8

Result Discussion and Conclusion

In this project, which turned out to be a full success, we designed a device that stops phone

ringing. This device could be used in places where ringing is not desired at specific times, as

these ringing’s may disturb people in such places. The designed device works in dual band. It

jams both the GSM 900 and GSM 1800 bands. The device was able to jam the three main cell

phone carriers in India.

The project was implemented according to the following plan. We started by studying the

jamming techniques, and GSM system to find the best jamming method. The system block

diagram was also specified in this stage. We searched for components that are needed for

building this device, and specified the main components which were. 1.1nH inductor was

required in our project, which are not available in local market, then we have ordered it online

from RS components.

42

References

1. http://www.instructables.com/id/How-To-Create-Your-Signal-Jammer/

2. http://www.circuitprojects.com/index2.php?option=com_content&task=view&id=132

&pop=1&page=0&Itemid=1

3. http://circuitsstream.blogspot.in/2012/09/simple-mobile-phone-jammer-circuit.html

4. http://www.electronicshub.org/mobile-jammer-circuit/

5. http://www.next.gr/rf/Jammer-Circuits/

6. http://hacknmod.com/hack/a-diy-mini-rf-cell-phone-jammer/

7. http://www.engineersgarage.com/forums/others/need-circuit-diagram-mobile-jammer

8. Rick Hartley, RF / Microwave PC Board Design and Layout, Avionics Systems.

9. John Scourias, Overview of the Global System for Mobile Communications, University

of Waterloo.

10. Ahmed Jisrawi, "GSM 900 Mobile Jammer", undergrad project, JUST, 2006.

11. Limor Fried, Social Defense Mechanisms: Tools for Reclaiming our Personal Space.

12. Siwiak, K., Radio-wave propagation and Antennas for personal communication.

13. Pozar, D., Microwave Engineering, John Wiley and Sons, 2005.

14. "FREQUENCY PLANNING AND FREQUENCY COORDINATION FOR THE

GSM 900, GSM 1800, E-GSM and GSM-R LAND MOBILE SYSTEMS (Except

Direct mode operation (DMO) channels)" by Working Group Frequency Management.

LM555TimerGeneral DescriptionThe LM555 is a highly stable device for generating accuratetime delays or oscillation. Additional terminals are providedfor triggering or resetting if desired. In the time delay mode ofoperation, the time is precisely controlled by one externalresistor and capacitor. For astable operation as an oscillator,the free running frequency and duty cycle are accuratelycontrolled with two external resistors and one capacitor. Thecircuit may be triggered and reset on falling waveforms, andthe output circuit can source or sink up to 200mA or driveTTL circuits.

Featuresn Direct replacement for SE555/NE555n Timing from microseconds through hoursn Operates in both astable and monostable modesn Adjustable duty cyclen Output can source or sink 200 mAn Output and supply TTL compatiblen Temperature stability better than 0.005% per ˚Cn Normally on and normally off outputn Available in 8-pin MSOP package

Applicationsn Precision timingn Pulse generationn Sequential timingn Time delay generationn Pulse width modulationn Pulse position modulationn Linear ramp generator

Schematic Diagram

00785101

July 2006

LM555

Timer

© 2006 National Semiconductor Corporation DS007851 www.national.com

Connection DiagramDual-In-Line, Small Outline

and Molded Mini Small Outline Packages

00785103

Top View

Ordering InformationPackage Part Number Package Marking Media Transport NSC Drawing

8-Pin SOIC LM555CM LM555CM RailsM08A

LM555CMX LM555CM 2.5k Units Tape and Reel

8-Pin MSOP LM555CMM Z55 1k Units Tape and ReelMUA08A

LM555CMMX Z55 3.5k Units Tape and Reel

8-Pin MDIP LM555CN LM555CN Rails N08E

LM55

5

www.national.com 2

Absolute Maximum Ratings (Note 2)

If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Supply Voltage +18V

Power Dissipation (Note 3)

LM555CM, LM555CN 1180 mW

LM555CMM 613 mW

Operating Temperature Ranges

LM555C 0˚C to +70˚C

Storage Temperature Range −65˚C to +150˚C

Soldering Information

Dual-In-Line Package

Soldering (10 Seconds) 260˚C

Small Outline Packages

(SOIC and MSOP)

Vapor Phase (60 Seconds) 215˚C

Infrared (15 Seconds) 220˚C

See AN-450 “Surface Mounting Methods and Their Effecton Product Reliability” for other methods of solderingsurface mount devices.

Electrical Characteristics (Notes 1, 2)

(TA = 25˚C, VCC = +5V to +15V, unless othewise specified)

Parameter Conditions Limits Units

LM555C

Min Typ Max

Supply Voltage 4.5 16 V

Supply Current VCC = 5V, RL = ∞VCC = 15V, RL = ∞(Low State) (Note 4)

310

615 mA

Timing Error, Monostable

Initial Accuracy 1 %

Drift with Temperature RA = 1k to 100kΩ, 50 ppm/˚C

C = 0.1μF, (Note 5)

Accuracy over Temperature 1.5 %

Drift with Supply 0.1 %/V

Timing Error, Astable

Initial Accuracy 2.25 %

Drift with Temperature RA, RB = 1k to 100kΩ, 150 ppm/˚C

C = 0.1μF, (Note 5)

Accuracy over Temperature 3.0 %

Drift with Supply 0.30 %/V

Threshold Voltage 0.667 x VCC

Trigger Voltage VCC = 15V 5 V

VCC = 5V 1.67 V

Trigger Current 0.5 0.9 μA

Reset Voltage 0.4 0.5 1 V

Reset Current 0.1 0.4 mA

Threshold Current (Note 6) 0.1 0.25 μA

Control Voltage Level VCC = 15VVCC = 5V

92.6

103.33

114

V

Pin 7 Leakage Output High 1 100 nA

Pin 7 Sat (Note 7)

Output Low VCC = 15V, I7 = 15mA 180 mV

Output Low VCC = 4.5V, I7 = 4.5mA 80 200 mV

LM555

www.national.com3

Electrical Characteristics (Notes 1, 2) (Continued)(TA = 25˚C, VCC = +5V to +15V, unless othewise specified)

Parameter Conditions Limits Units

LM555C

Min Typ Max

Output Voltage Drop (Low) VCC = 15V

ISINK = 10mA 0.1 0.25 V

ISINK = 50mA 0.4 0.75 V

ISINK = 100mA 2 2.5 V

ISINK = 200mA 2.5 V

VCC = 5V

ISINK = 8mA V

ISINK = 5mA 0.25 0.35 V

Output Voltage Drop (High) ISOURCE = 200mA, VCC = 15V 12.5 V

ISOURCE = 100mA, VCC = 15V 12.75 13.3 V

VCC = 5V 2.75 3.3 V

Rise Time of Output 100 ns

Fall Time of Output 100 ns

Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified.

Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device isfunctional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions whichguarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limitis given, however, the typical value is a good indication of device performance.

Note 3: For operating at elevated temperatures the device must be derated above 25˚C based on a +150˚C maximum junction temperature and a thermalresistance of 106˚C/W (DIP), 170˚C/W (S0-8), and 204˚C/W (MSOP) junction to ambient.

Note 4: Supply current when output high typically 1 mA less at VCC = 5V.

Note 5: Tested at VCC = 5V and VCC = 15V.

Note 6: This will determine the maximum value of RA + RB for 15V operation. The maximum total (RA + RB) is 20MΩ.

Note 7: No protection against excessive pin 7 current is necessary providing the package dissipation rating will not be exceeded.

Note 8: Refer to RETS555X drawing of military LM555H and LM555J versions for specifications.

LM55

5

www.national.com 4

L7800SERIES

POSITIVE VOLTAGE REGULATORS

November 1999

OUTPUT CURRENT UP TO1.5 A OUTPUT VOLTAGESOF 5; 5.2; 6; 8; 8.5; 9;12; 15; 18; 24V

THERMAL OVERLOADPROTECTION SHORTCIRCUIT PROTECTION OUTPUT TRANSITION SOAPROTECTION

DESCRIPTIONThe L7800 series of three-terminal positiveregulators is available in TO-220 ISOWATT220TO-3 and D2PAK packages and several fixedoutput voltages, making it useful in a wide rangeof applications.These regulators can provide localon-card regulation, eliminating the distributionproblems associated with single point regulation.Each type employs internal current limiting,thermal shut-down and safe area protection,making it essentially indestructible. If adequateheat sinking is provided, they can deliver over 1Aoutput current. Although designed primarily asfixed voltage regulators, these devices can beused with external components to obtainadjustable voltages and currents.

12

TO-3

TO-220 ISOWATT220

D2PAK

BLOCKDIAGRAM

®

1/25

CONNECTION DIAGRAMANDORDERING NUMBERS (top view)

TO-220 & ISOWATT220 TO-3D2PAK

THERMALDATASymbol Parameter D2PAK TO-220 ISOWATT220 TO-3 Unit

Rthj- ca se

Rthj-amb

Thermal Resistance Junction-case MaxThermal Resistance Junction-ambient Max

362.5

350

460

435

oC/WoC/W

Type TO-220 D2PAK (*) ISOWATT220 TO-3 Output Voltage

L7805L7805CL7852CL7806L7806CL7808L7808CL7885CL7809CL7812L7812CL7815L7815CL7818L7818CL7820L7820CL7824L7824C

L7805CVL7852CV

L7806CV

L7808CVL7885CVL7809CV

L7812CV

L7815CV

L7818CV

L7820CV

L7824CV

L7805CD2TL7852CD2T

L7806CD2T

L7808CD2TL7885CD2TL7809CD2T

L7812CD2T

L7815CD2T

L7818CD2T

L7820CD2T

L7824CD2T

L7805CPL7852CP

L7806CP

L7808CPL7885CPL7809CP

L7812CP

L7815CP

L7818CP

L7820CP

L7824CP

L7805TL7805CTL7852CTL7806TL7806CTL7808TL7808CTL7885CTL7809CTL7812TL7812CTL7815TL7815CTL7818TL7818CTL7820TL7820CTL7824TL7824CT

5V5V5.2V6V6V8V8V8.5V9V12V12V15V15V18V18V20V20V24V24V

(*) AVAILABLE IN TAPE AND REEL WITH ”-TR” SUFFIX

ABSOLUTE MAXIMUM RATINGSSymbol Parameter Value Unit

Vi DC Input Voltage (for VO = 5 to 18V)(forVO = 20, 24V)

3540

VV

Io Output Current Internally limited

Ptot Power Dissipation Internally limited

Top Operating Junction Temperature Range (for L7800)(for L7800C)

-55 to 1500 to 150

oCoC

Tstg Storage Temperature Range -65 to 150 oC

L7800

2/25

ELECTRICALCHARACTERISTICS FOR L7818 (refer to the test circuits, Tj = -55 to 150 oC,Vi = 26V, Io = 500 mA, Ci = 0.33 μF, Co = 0.1 μF unless otherwise specified)Symbol Parameter Test Conditions Min. Typ. Max. Unit

Vo Output Voltage Tj = 25oC 17.3 18 18.7 V

Vo Output Voltage Io = 5 mA to 1 A Po ≤ 15WVi = 22 to 33 V

17.1 18 18.9 V

ΔVo* LineRegulation Vi = 21 to 33 V Tj = 25oC

Vi = 24 to 30 V Tj = 25oC

18090

mVmV

ΔVo* Load Regulation Io = 5 to 1500mA Tj = 25oC

Io = 250 to 750mA Tj = 25oC

18090

mVmV

Id Quiescent Current Tj = 25oC 6 mA

ΔId Quiescent Current Change Io = 5 to 1000mA 0.5 mA

ΔId Quiescent Current Change Vi = 22 to 33 V 0.8 mA

ΔVoΔT

Output VoltageDrift Io = 5 mA 2.3 mV/oC

eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25oC 40 μV/VO

SVR Supply Voltage Rejection Vi = 22 to 32 V f = 120Hz 59 dB

Vd Dropout Voltage Io = 1 A Tj = 25oC 2 2.5 V

Ro Output Resistance f = 1 KHz 22 mΩ

Isc Short Circuit Current Vi = 35 V Tj = 25oC 0.75 1.2 A

Iscp Short Circuit Peak Current Tj = 25oC 1.3 2.2 3.3 A

ELECTRICALCHARACTERISTICS FOR L7815 (refer to the test circuits, Tj = -55 to 150oC,

Vi = 23V, Io = 500 mA, Ci = 0.33 μF, Co = 0.1 μF unless otherwise specified)Symbol Parameter Test Conditions Min. Typ. Max. Unit

Vo Output Voltage Tj = 25oC 14.4 15 15.6 V

Vo Output Voltage Io = 5 mA to 1 A Po ≤ 15WVi = 18.5 to 30 V

14.25 15 15.75 V

ΔVo* LineRegulation Vi = 17.5 to 30 V Tj = 25oC

Vi = 20 to 26 V Tj = 25oC

15075

mVmV

ΔVo* Load Regulation Io = 5 to 1500mA Tj = 25oC

Io = 250 to 750mA Tj = 25oC

15075

mVmV

Id Quiescent Current Tj = 25oC 6 mA

ΔId Quiescent Current Change Io = 5 to 1000mA 0.5 mA

ΔId Quiescent Current Change Vi = 18.5 to 30 V 0.8 mA

ΔVoΔT

Output VoltageDrift Io = 5 mA 1.8 mV/oC

eN Output Noise Voltage B = 10Hz to 100KHz Tj = 25oC 40 μV/VO

SVR Supply Voltage Rejection Vi = 18.5 to 28.5 V f = 120 Hz 60 dB

Vd Dropout Voltage Io = 1 A Tj = 25oC 2 2.5 V

Ro Output Resistance f = 1 KHz 19 mΩ

Isc Short Circuit Current Vi = 35 V Tj = 25oC 0.75 1.2 A

Iscp Short Circuit Peak Current Tj = 25oC 1.3 2.2 3.3 A

* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into accountseparately. Pulce testing with low duty cycle is used.

L7800

7/25

©2002 Fairchild Semiconductor Corporation Rev. A2, August 2002

BC

54

6/5

47

/54

8/54

9/550

NPN Epitaxial Silicon Transistor

Absolute Maximum Ratings Ta=25°C unless otherwise noted

Electrical Characteristics Ta=25°C unless otherwise noted

hFE Classification

Symbol Parameter Value Units

VCBO Collector-Base Voltage : BC546 : BC547/550: BC548/549

805030

VVV

VCEO Collector-Emitter Voltage : BC546 : BC547/550: BC548/549

654530

VVV

VEBO Emitter-Base Voltage : BC546/547: BC548/549/550

65

VV

IC Collector Current (DC) 100 mA

PC Collector Power Dissipation 500 mW

TJ Junction Temperature 150 °CTSTG Storage Temperature -65 ~ 150 °C

Symbol Parameter Test Condition Min. Typ. Max. Units

ICBO Collector Cut-off Current VCB=30V, IE=0 15 nA

hFE DC Current Gain VCE=5V, IC=2mA 110 800

VCE (sat) Collector-Emitter Saturation Voltage IC=10mA, IB=0.5mAIC=100mA, IB=5mA

90200

250600

mVmV

VBE (sat) Base-Emitter Saturation Voltage IC=10mA, IB=0.5mAIC=100mA, IB=5mA

700900

mVmV

VBE (on) Base-Emitter On Voltage VCE=5V, IC=2mAVCE=5V, IC=10mA

580 660 700720

mVmV

fT Current Gain Bandwidth Product VCE=5V, IC=10mA, f=100MHz 300 MHz

Cob Output Capacitance VCB=10V, IE=0, f=1MHz 3.5 6 pF

Cib Input Capacitance VEB=0.5V, IC=0, f=1MHz 9 pF

NF Noise Figure : BC546/547/548: BC549/550: BC549: BC550

VCE=5V, IC=200μAf=1KHz, RG=2KΩVCE=5V, IC=200μARG=2KΩ, f=30~15000MHz

21.21.41.4

10443

dBdBdBdB

Classification A B C

hFE 110 ~ 220 200 ~ 450 420 ~ 800

BC546/547/548/549/550

Switching and Applications• High Voltage: BC546, VCEO=65V• Low Noise: BC549, BC550• Complement to BC556 ... BC560

1. Collector 2. Base 3. Emitter

TO-921

http://www.murata.com/

Data Sheet

!Note:1. This datasheet is downloaded from the website of Murata Manufacturing co., ltd. Therefore, it’s specifications are subject to change or our

products in it may be discontinued without advance notice. Please check with our sales representatives or product engineers before ordering.

2. This datasheet has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

1

o This data sheet is applied for CHIP INDUCTORS (CHIP COILS) used for General Electronics equipment for your design.

2010.9.9

Inductors (Coils) > Chip Inductor (Chip Coil) > for High Frequency Multilayer Type

0.5±0.05

(in mm)

1.0±0.05

0.5±

0.05

0.25±0.1

Polarity Marking

Chip Inductor (Chip Coil) for High Frequency Multilayer Type

LQG15HN Series (0402 Size)

Dimensions PackagingCode Packaging Minimum Quantity

D 180mm Paper Tape 10000

J 330mm Paper Tape 50000

B Bulk(Bag) 1000

Rated Value (p: packaging code)

Part Number Inductance Test Frequency Rated Current Max. of DC resistance Q (min.) Test Frequency Self Resonance Frequency (min.)

LQG15HN1N0S02p 1.0nH±0.3nH 100MHz 300mA 0.10ohm 8 100MHz 6000MHz

LQG15HN1N1S02p 1.1nH±0.3nH 100MHz 300mA 0.10ohm 8 100MHz 6000MHz

LQG15HN1N2S02p 1.2nH±0.3nH 100MHz 300mA 0.10ohm 8 100MHz 6000MHz

LQG15HN1N3S02p 1.3nH±0.3nH 100MHz 300mA 0.10ohm 8 100MHz 6000MHz

LQG15HN1N5S02p 1.5nH±0.3nH 100MHz 300mA 0.10ohm 8 100MHz 6000MHz

LQG15HN1N6S02p 1.6nH±0.3nH 100MHz 300mA 0.10ohm 8 100MHz 6000MHz

LQG15HN1N8S02p 1.8nH±0.3nH 100MHz 300mA 0.10ohm 8 100MHz 6000MHz

LQG15HN2N0S02p 2.0nH±0.3nH 100MHz 300mA 0.12ohm 8 100MHz 6000MHz

LQG15HN2N2S02p 2.2nH±0.3nH 100MHz 300mA 0.15ohm 8 100MHz 6000MHz

LQG15HN2N4S02p 2.4nH±0.3nH 100MHz 300mA 0.16ohm 8 100MHz 6000MHz

LQG15HN2N7S02p 2.7nH±0.3nH 100MHz 300mA 0.17ohm 8 100MHz 6000MHz

LQG15HN3N0S02p 3.0nH±0.3nH 100MHz 300mA 0.18ohm 8 100MHz 6000MHz

LQG15HN3N3S02p 3.3nH±0.3nH 100MHz 300mA 0.19ohm 8 100MHz 6000MHz

LQG15HN3N6S02p 3.6nH±0.3nH 100MHz 300mA 0.19ohm 8 100MHz 6000MHz

LQG15HN3N9S02p 3.9nH±0.3nH 100MHz 300mA 0.19ohm 8 100MHz 6000MHz

LQG15HN4N3S02p 4.3nH±0.3nH 100MHz 300mA 0.21ohm 8 100MHz 6000MHz

LQG15HN4N7S02p 4.7nH±0.3nH 100MHz 300mA 0.23ohm 8 100MHz 6000MHz

LQG15HN5N1S02p 5.1nH±0.3nH 100MHz 300mA 0.24ohm 8 100MHz 6000MHz

LQG15HN5N6S02p 5.6nH±0.3nH 100MHz 300mA 0.26ohm 8 100MHz 5300MHz

LQG15HN6N2S02p 6.2nH±0.3nH 100MHz 300mA 0.27ohm 8 100MHz 4300MHz

LQG15HN6N8J02p 6.8nH±5% 100MHz 300mA 0.29ohm 8 100MHz 4200MHz

LQG15HN7N5J02p 7.5nH±5% 100MHz 300mA 0.31ohm 8 100MHz 3900MHz

LQG15HN8N2J02p 8.2nH±5% 100MHz 300mA 0.33ohm 8 100MHz 3600MHz

Operating Temperature Range: -55°C to +125°COnly for reflow soldering.

Continued on the following page.