AProject Report

OnCell Phone RF Signal Detector & Jammer

Presented By :1. Amar Raj (3rb08ec007)2. Rishu Raj (3rb09ec060)3. Aman Kumar (3rb09ec100)4. Ravi Kumar (3rb10ec071)

Under The Guidance Of :Mr. Dhiraj Deshpande

(Asst. Professor)

Containing Introduction Jamming Technique Design Parameters How does It Works Hardware Design Software Description Application Advantages Disadvantages Conclusion

Introduction Jamming Technique Design Parameters How does It Works Hardware Design Software Description Application Advantages Disadvantages Conclusion

Introduction Mobile jammer is used to prevent mobile phones from receiving or

transmitting signals with the base stations.

Mobile jammers effectively disable mobile phones within the definedregulated zones.

As with other radio jamming, mobile jammers block mobile phone useby sending out radio waves along the same frequencies that mobilephones use.

Upon activating mobile jammers, all mobile phones will indicate "NONETWORK". Incoming calls are blocked as if the mobile phone wereoff.

When the mobile jammers are turned off, all mobile phones willautomatically re-establish communications and provide full service.

Mobile jammer is used to prevent mobile phones from receiving ortransmitting signals with the base stations.

Mobile jammers effectively disable mobile phones within the definedregulated zones.

As with other radio jamming, mobile jammers block mobile phone useby sending out radio waves along the same frequencies that mobilephones use.

Upon activating mobile jammers, all mobile phones will indicate "NONETWORK". Incoming calls are blocked as if the mobile phone wereoff.

When the mobile jammers are turned off, all mobile phones willautomatically re-establish communications and provide full service.

Jamming Technique Spoofing :

In this kind of jamming, the device forces the mobile to turn offitself.

Shielding AttacksThis is known as TEMPEST or EMF shielding. This kind requiresclosing an area in a faraday cage so that any device inside thiscage can not transmit or receive RF signal from outside of thecage.

Denial of ServiceA jamming device transmits on the same radiofrequencies as thecell phone, disrupting the communication between the phoneand the cell-phone base station.

Spoofing :In this kind of jamming, the device forces the mobile to turn offitself.

Shielding AttacksThis is known as TEMPEST or EMF shielding. This kind requiresclosing an area in a faraday cage so that any device inside thiscage can not transmit or receive RF signal from outside of thecage.

Denial of ServiceA jamming device transmits on the same radiofrequencies as thecell phone, disrupting the communication between the phoneand the cell-phone base station.

Design Parameters The frequency bands

GSM900:Uplink: 890-915 MHzDown link: 935-960 MHz

In our Design the frequency must be the same as the downlink because itneeds lower power to do jamming.

The Distance to be jammed(D)This parameter is very useful in our design since the amount of the outputpower of the jammer depends on the area we need to jam.Our design is established upon D=2.0 m for GSM 900.

The frequency bandsGSM900:

Uplink: 890-915 MHzDown link: 935-960 MHz

In our Design the frequency must be the same as the downlink because itneeds lower power to do jamming.

The Distance to be jammed(D)This parameter is very useful in our design since the amount of the outputpower of the jammer depends on the area we need to jam.Our design is established upon D=2.0 m for GSM 900.

Design Parameters contd.• For GSM, the specified system SNRmin is 9 dB which will be

used as the worst case scenario for the jammer. The maximumpower at the mobile device Pr is -15 dBm.

• Free space loss {F}The free-space loss (or path loss) is given by:

Path loss(dB)= 32.44 + 20 log d km + 20 log f(MHz)The maximum free space loss (worst case F) happens

when the maximum frequency is used in the above equation. Using 960 MHz gives: F (dB) =32.44+20 log 0.02 + 20 log 960 which gives F =58 dB.

• For GSM, the specified system SNRmin is 9 dB which will beused as the worst case scenario for the jammer. The maximumpower at the mobile device Pr is -15 dBm.

• Free space loss {F}The free-space loss (or path loss) is given by:

Path loss(dB)= 32.44 + 20 log d km + 20 log f(MHz)The maximum free space loss (worst case F) happens

when the maximum frequency is used in the above equation. Using 960 MHz gives: F (dB) =32.44+20 log 0.02 + 20 log 960 which gives F =58 dB.

Process of Jamming• Mobile Phone uses RF with a wavelength of 30 cm at 872-2170 MHz.

•Detector convert this RF signal to little current to glow LED or trigger the

buzzer.

•The output of detector goes to microcontroller where analog signal is

converted to digital signal.

•This digital signal is applied to Relay & LCD.

•The relay behave as a switch.

•The output of the Relay behaves as the i/p of the jammer circuit.

•The jammer circuit is activated for 60 sec (user specified).

• Mobile Phone uses RF with a wavelength of 30 cm at 872-2170 MHz.

•Detector convert this RF signal to little current to glow LED or trigger the

buzzer.

•The output of detector goes to microcontroller where analog signal is

converted to digital signal.

•This digital signal is applied to Relay & LCD.

•The relay behave as a switch.

•The output of the Relay behaves as the i/p of the jammer circuit.

•The jammer circuit is activated for 60 sec (user specified).

Hardware DescriptionOur Project Contains The Following Main Parts : Detector Relay Microcontroller Crystal Oscillator LCD On Chip RTC Regulated Power Supply Jammer Circuit

Our Project Contains The Following Main Parts : Detector Relay Microcontroller Crystal Oscillator LCD On Chip RTC Regulated Power Supply Jammer Circuit

Detector

Circuit Diagram Of the Detector

Detector contd.• Mobile phone uses RF with a wavelength of 30cm at 872 to 2170 MHz.

•Mobile phone transmits the signal in the form of sine wave.

•The signal contains electromagnetic radiation which is picked up by the

receiver in the base station.

•A capacitor is used to detect RF from mobile phone considering that, a

capacitor can store energy even from an outside source and oscillate like

LC circuit.

• Mobile phone uses RF with a wavelength of 30cm at 872 to 2170 MHz.

•Mobile phone transmits the signal in the form of sine wave.

•The signal contains electromagnetic radiation which is picked up by the

receiver in the base station.

•A capacitor is used to detect RF from mobile phone considering that, a

capacitor can store energy even from an outside source and oscillate like

LC circuit.

Relay

A relay is an electrically operated switch. Currentflowing through the coil of the relay creates a magnetic field whichattracts a lever and changes the switch contacts. The coil currentcan be on or off so relays have two switch positions and they aredouble throw (changeover) switches.

Relay Circuit

Microcontroller

Pin Diagram

Microcontroller contd.Peripheral Interface Controllers (PIC) is one of the advancedmicrocontrollers developed by microchip technologies.

• RISC CPU• Instruction Set is 35• Operating Speed : DC-20Mhz clock input• 200 ns instruction cycle• 2K*14 words program memory• 128*8 bytes data memory• 8 level deep hardware stack• Voltage Range : 2.0v to 5.5v• Source or sink current : 25mA• 8-bit, 5 channel Analog to Digital Converter

Peripheral Interface Controllers (PIC) is one of the advancedmicrocontrollers developed by microchip technologies.

• RISC CPU• Instruction Set is 35• Operating Speed : DC-20Mhz clock input• 200 ns instruction cycle• 2K*14 words program memory• 128*8 bytes data memory• 8 level deep hardware stack• Voltage Range : 2.0v to 5.5v• Source or sink current : 25mA• 8-bit, 5 channel Analog to Digital Converter

Crystal Oscillator

Crystal oscillator is made up of quartz crystal

with the desired value of resonant frequency forms

part of the frequency-selective feedback network.

The crystal oscillator speed that can be

connected to the PIC microcontroller range from DC

to 20Mhz.

Crystal oscillator is made up of quartz crystal

with the desired value of resonant frequency forms

part of the frequency-selective feedback network.

The crystal oscillator speed that can be

connected to the PIC microcontroller range from DC

to 20Mhz.

LCDLCD screen consists of two lines

with 16 characters each. Each

character consists of 5x7dot

matrix.

Pin Details of LCD

LCD screen consists of two lines

with 16 characters each. Each

character consists of 5x7dot

matrix.

On Chip RTCThe real time clock (RTC) is a widely used device thatprovides accurate time and date for many applications. TheRTC chip present in the PC provides time components ofhour, minute and second.

The RTC chip uses an internal battery that keeps thetime and date even when the power is off. One of the mostwidely used RTC chips is the DS1307 from Dallassemiconductor.

The real time clock (RTC) is a widely used device thatprovides accurate time and date for many applications. TheRTC chip present in the PC provides time components ofhour, minute and second.

The RTC chip uses an internal battery that keeps thetime and date even when the power is off. One of the mostwidely used RTC chips is the DS1307 from Dallassemiconductor.

Jammer

Power Supply IF Section RF Section JammingSignal

Circuit Diagram

Power Supply IF Section RF Section JammingSignal

Power Supply for Jammer

Transformer Rectification Filter Regulator

Circuit Diagram

Block Diagram

Circuit Diagram

Signal Mixer

TriangularWave

Generator

If - Section

To RFSection

Signal Mixer To RFSection

NoiseGenerator

Triangular Wave Generator• The main use of the triangle wave is to sweep the VCO through the desired

frequency range.

• We want to cover the downlink through our VCO, i.e., 935-960 MHz .

• The main use of the triangle wave is to sweep the VCO through the desired

frequency range.

• We want to cover the downlink through our VCO, i.e., 935-960 MHz .

Noise Generator

To achieve jamming a noise signal is mixed with the triangle wave signal

to produce the tuning voltage for the VCO. The noise will help in masking the jamming

transmission, making it look like random "noise” to an outside observer .Without the

noise generator, the jamming signal is just a sweeping, un-modulated Continuous Wave

RF carrier.

To achieve jamming a noise signal is mixed with the triangle wave signal

to produce the tuning voltage for the VCO. The noise will help in masking the jamming

transmission, making it look like random "noise” to an outside observer .Without the

noise generator, the jamming signal is just a sweeping, un-modulated Continuous Wave

RF carrier.

Signal mixer

The mixer here is just an amplifier that operates as a summer. So, the

noise and triangular wave will add together before entering the VCO.

Rf - Section

JammingSignalVoltage

ControlOscillator

RF PowerAmplifiers Antenna

From IFsection

JammingSignalVoltage

ControlOscillator

RF PowerAmplifiers Antenna

VCOThe voltage controlled oscillator (VCO) is the heart of

the RF-section. It is the device that generates the RF

signal which will interfere with the cell phone.

The output of the VCO has a frequency which

is proportional to the input voltage, thus, we can

control the output frequency by changing the input

voltage.

The voltage controlled oscillator (VCO) is the heart of

the RF-section. It is the device that generates the RF

signal which will interfere with the cell phone.

The output of the VCO has a frequency which

is proportional to the input voltage, thus, we can

control the output frequency by changing the input

voltage.

Power AmplifierSince 5 dBm output powers from the VCO do not achieve the desired

output power of the GSM jammer, we had to add an amplifier with a

suitable gain to increase the VCO output to 34 dBm.

Since 5 dBm output powers from the VCO do not achieve the desired

output power of the GSM jammer, we had to add an amplifier with a

suitable gain to increase the VCO output to 34 dBm.

AntennaA proper antenna is necessary to transmit thejamming signal. In this project, we used three 1/4wavelength monopole antennas, with 50 Ω inputimpedance so that the antennas are matched to thesystem. We used monopole antenna since theradiation pattern is omni-directional.

GSM 900 antenna Specifications:

1. Frequency: 850MHz-1GHz2. Input impedance 50Ω3. VSWR<2

A proper antenna is necessary to transmit thejamming signal. In this project, we used three 1/4wavelength monopole antennas, with 50 Ω inputimpedance so that the antennas are matched to thesystem. We used monopole antenna since theradiation pattern is omni-directional.

GSM 900 antenna Specifications:

1. Frequency: 850MHz-1GHz2. Input impedance 50Ω3. VSWR<2

Software Description

Softwares used inthis project

Express PCB –for designing

circuit

Express PCB –for designing

circuit

PIC C compiler -for compilation

part

PIC C compiler -for compilation

part

Proteus 7(Embedded C) –

for simulationpart

Proteus 7(Embedded C) –

for simulationpart

•Express PCBExpress PCB is a software tool to design PCBs specifically for manufacture by thecompany Express PCB (no other PCB maker accepts Express PCB files). It is very easyto use.

•PIC C compilerPIC compiler is software used where the machine language code is written andcompiled. After compilation, the machine source code is converted into hex codewhich is to be dumped into the microcontroller for further processing.

•Proteus 7Proteus is software which accepts only hex files. Once the machine code is convertedinto hex code, that hex code has to be dumped into the microcontroller and this isdone by the Proteus.

Express PCB is a software tool to design PCBs specifically for manufacture by thecompany Express PCB (no other PCB maker accepts Express PCB files). It is very easyto use.

•PIC C compilerPIC compiler is software used where the machine language code is written andcompiled. After compilation, the machine source code is converted into hex codewhich is to be dumped into the microcontroller for further processing.

•Proteus 7Proteus is software which accepts only hex files. Once the machine code is convertedinto hex code, that hex code has to be dumped into the microcontroller and this isdone by the Proteus.

Applications• Gas stations, the air entrainment station, the fueldepot and the flammable explosive chemicalwarehouse, the refinery, the petrified factory and so onneed safely to protect place• Governments, enterprise's each kind ofconference room• Armies, public security department's importantconference rooms• Hospitals, Courts, Theatres etc.

• Gas stations, the air entrainment station, the fueldepot and the flammable explosive chemicalwarehouse, the refinery, the petrified factory and so onneed safely to protect place• Governments, enterprise's each kind ofconference room• Armies, public security department's importantconference rooms• Hospitals, Courts, Theatres etc.

Advantages• Easy to operate.• Low power consumption.• Efficient design.• Eliminates button operations.•No need for training.•Fast response.•Sophisticated security.•Simple and Reliable Design

• Easy to operate.• Low power consumption.• Efficient design.• Eliminates button operations.•No need for training.•Fast response.•Sophisticated security.•Simple and Reliable Design

Disadvantages•Radiation harmful for humans

• We may lose some important calls.

Result, Conclusion & Future ScopeResult:•The project “Cell Phone RF Signal detector and Jammer” was designed to help for securitypurpose.• The activation and deactivation time schedules can be programmed with microcontroller.

Conclusion:Integrating features of all the hardware components used have been developed in it. Presence ofevery module has been reasoned out and placed carefully, thus contributing to the best workingof the unit. Secondly, using highly advanced IC’s with the help of growing technology, theproject has been successfully implemented. Thus the project has been successfully designed andtested.

Future Scope:Our project “Cell Phone RF Signal detector and Jammer” is mainly intended to provide aninteraction with detector and Jammer.

This project can be extended to block the signal of 3G & 4G.

Due to lack of components we won’t be able to do this.

Result:•The project “Cell Phone RF Signal detector and Jammer” was designed to help for securitypurpose.• The activation and deactivation time schedules can be programmed with microcontroller.

Conclusion:Integrating features of all the hardware components used have been developed in it. Presence ofevery module has been reasoned out and placed carefully, thus contributing to the best workingof the unit. Secondly, using highly advanced IC’s with the help of growing technology, theproject has been successfully implemented. Thus the project has been successfully designed andtested.

Future Scope:Our project “Cell Phone RF Signal detector and Jammer” is mainly intended to provide aninteraction with detector and Jammer.

This project can be extended to block the signal of 3G & 4G.

Due to lack of components we won’t be able to do this.

THAnk u alL.