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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.
