BLUETOOTH JAMMER

AIM

This is a most high tech and advanced

project that shows the real working model

of a blue tooth signal jammer system.This

system is being used world wide to

prevent act of theft where the remote

located cellphone or laptop is used to

transfer the data.

COMPONENTS

Microcontroller(AT89C51)

Bluetooth module

Frequency hopping Generator

2.4 GHz modulator

MMIC

Harmonic filter

Whip Antenna

BLOCK DIAGRAM

Micro

controller

RF

Range

MMICHopping

Frequency

Generator

Mixer

strip

line

LCD

Wideband

RF

AmplifierTrigger

Noise

Generator

Harmonic

filter

Microwave

Detector

Power

Amplifier

DC

Level

adjust

2.4GHz

Modulator

50-ohm strip

line

Antenna

BLUETOOTH

Bluetooth is a de facto standard and

specification for small-form factor, low-cost, short

range radio links between mobile PCs, mobile

phones and other portable devices.

The technology allows users to form wireless

connections between various communication

devices, in order to transmit real-time voice and

data communications.

•The Bluetooth radio is built into a small microchip

and operates in the 2.4Ghz band, a globally available

frequency band ensuring communication compatibility

worldwide.

It uses frequency hopping spread spectrum, which

changes its signal 1600 times per second which helps

to avoid interception by unauthorized parties.

• Bluetooth wireless technology is a low-cost, low-power, short-range radio

technology for mobile devices and for WAN/LAN access points.

• Currently, over 2000 companies support and adopted the Bluetooth

technology, which highlights the fact that Bluetooth is quickly becoming one of

the low-cost wireless technologies being adopted for personal area networks.

• Bluetooth makes it possible to transmit signals over short distances

between broadband access devices, telephones, PCs, information appliances

and other devices.

• Upon introduction, the adoption rate of the Bluetooth technology was quite

slow, but as the technology grows and as more companies in consumer digital

electronics, cellular phones and automotive electronics produce Bluetooth-

enabled products, more consumers will be intrigued by the technology and how it

can benefit them in this wireless age of communication.

MICROCONTROLLER

It is 8-bit micro controller

It has 40 pin IC.

It has 2 timers,5 interrupts.

It occupies 250 instructions.

It carries assembly and high level codings.

Operating voltage is 5V.

FREQUENCY HOPPING GENERATOR

Bluetooth adapts frequency hopping

technology.

Here the frequency spectrum is varied 1600

signals per second.

Since that the interception and anti jamming

capability will be increased.

2.4 GHz MODULATOR

It modulates bluetooth signal in the range

of 2.4 to 2.48 GHz.

It uses PN sequence generator to produce

carrier signal with the high frequency range.

Frequency hopping is classified into two

types,1.fast frequency hopping

2.slow frequency hopping

MMIC

MMIC stands for Monolithic Microwave

Integrated Circuit.

It helps to integrate the frequencies in the

range of GHz.

The fabrication is done VLSI

technology.

HARMONIC FILTER

It uses RFC choke and capacitor for critical

coupling.

It rejects first and second order distortions.

It carries filter coefficients according to the

distortions.