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Introduction

In the development of the first stage of Jammer delved in research and analysis locking circuit, in

order to understand the principles of operation of the circuit Jammer, known operating

parameters causing the information carrier to which mounting the noise signal factor. Then we

engage in a very important part for the proper functioning and development of the systems, thiswas the investigation of the devices that were used for the Jammer, for this we take part of

different circuits selected for a possible design, we engage in the various steps involved in this

system.

Jammer systems encompass various blocking communication signals, affect the functioning of the

major networks that are used daily, such as 2G mobile network, this is the main block signal, it is

noteworthy that the frequency at which Blocker will work 850MHz up to 2700 MHz

There are various stages that are used to create a signal blocker (Jammer), mention the most

important are considered to occur blocking the signal.

The stage of a triangular wave generator, which will serve to generate a signal which wanders

through the antennas, another stage is the noise generator, this part is important because it is the

system that is responsible for generating noise will distort and disrupt.

Subsequently continuing the assignment of the antennas to identify the antennas to be used for

the propagation of this noise carrier signal, identify the characteristics that correspond to the

antennas and the parameters range and signal propagation noise.

Proposed circuit is simulated for each stage of the system and simulated to observe and analyze

the results generated and whether they met the characteristics and parameters required to

generate this signal noise carrier.

Jamming Technique

Jamming The term does not have an accurate translation that encompasses the whole concept.

In its purest sense, Jamming is defined as an activity that affects the timeline in any

communication. That is, making the information does not reach the recipient at the time that he

should do so. To affect this, it also affects the relevance of the information. This is because the

information is only useful in certain instant. Not useful if received before or after the set time.

Electronic support

Its function is to measure parameters of interest in the communications system. One of the main

reasons for doing this is that if there is no signal to interfere no point spending power jammer

implemented. However, depending on the application will be the type of jammer employed. It is

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so you can keep one jammer operation indefinitely or be turned on as long as communication is

detected.

The parameters responsible for measuring addresses are supported.

SNR (Signal-To-Noise Ratio)

Determine the quality with which the signal reaches the receiver after traveling the path of the

communication system and go polluted by noise.

JSR (Jam-to-Signal Ratio)

Determines whether the power with which transmits the jammer is higher or lower than that

used by the original system transmitter.

PSR (Packet Send Ratio) Match the packets were successfully sent traffic a route with the packages being shipped outside

tried MAC layer.

PDR (Packet Delivery Ratio)

Compare the number of packets received with the number of packets generated.

BER (Bit Error Rate)

is the probability that a bit is incorrect.

SER (Symbol Error Rate)

is the probability that a symbol is incorrect.

SIR (Signal-to-Interference Ratio)Is the ratio between the desired signal power and the sum of the power of the unwanted signals.

Theoretical framework

Jammer circuit is a device designed to lock the mobile phone operation by transmitting a signal

that interrupts the communication between a mobile device and base station.

Since its inception, the radio-based technologies have often been exploited various reasons, the

uses that are given or what they are busy does not always have the best intentions. It has been

known cases where the radio channel frequencies that have been used to detonate bombs in

urban areas or events that turns a lot of people, these pumps are activated remotely allowing thetrigger and not exposed to danger of these.

The radio spectrum is also used with the intention of spying, allowing remote monitoring devices

placed (whether voice, video or data), another case of monitoring is to place tracking devices that

identify the location of a person or the object on which the device was placed.

Jammer is currently used as a device for both personal or corporate security, because as

mentioned, a radio-frequency of this type is capable of inducing noise and interfere with a

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frequency range given as diplomatic figures important in some carrying cases such devices. In

recent years, the cellular signal Jammer blockers have been implemented in public places such as

churches and theaters in order to avoid annoying and loud interruptions Call alert tones.

Unfortunately, these devices are expensive and their use and implementation may cause

problems, depending on the scope coverage area for which they are designed and where put to

radiate scanning channel or channels for which it is designed to work. Since these devices usually

radiate at frequencies that are used privately and requires monetary cost to cover a regulator of

the electromagnetic spectrum, these devices are considered illegal because they interfere and

radiate frequencies why someone if paying by use. However, its use is not restricted as these are

limited in scope to places where a private body does not want that these signals can provide a link

of any kind, where the owners do not want this spectrum to establish a communication within

your building.

METHODOLOGY

PCS bands ranges

Knowledge of PCS bands ranges (Personal Communication Services) will help usdetermine the complexity of our jammer well as the type of oscillator we need.

Types and advantages of jammers

There are different types of jammers, and each level of complexity involves-profit.

Analysis

Voltage Controlled Oscillator

Knowing manipulate and seek necessary sweep ideal for work in order of GHz

Circuit tunerProvide the input voltage to the oscillator.

antenna

Considering an ideal band width, having a good profit.

MATERIAL:

Technical jammer

Analyzing the technique presented in the selection of the investigation.

Signal Conditioning

The amplitude and frequency can be modified by external devices tofunction generator.

Settings

Obstruction Handling Wireless signals

The project already completed, you will perform the necessary tests toverify proper operation.

Testing