1. MOBILE JAMMERS Submitted By: PVS Soumya [2/4] Sai Nandini T [2/4] GNITS GNITS

2. Contents • Introduction • Basic Principle • Types of mobile Jamming • Mobile Jamming Requirements • Components of GSM Mobile Jammer • Applications • Advantages • Conclusion

3. MOBILE A BIG NUISANCE

4. Polite requests asking people to put their mobiles ‘away’ • but many people don’t care looking at

5. Basic Principle

6. GSM 900 • Global System For Mobiles • Spectrum range: 890Mhz - 915MHz [uplink] 935Mhz 960MHz [downlink] • Introduced 2G mobiles • Security, Quality, Capacity and ability to support IC’s • Short message service [SMS]

7. Types of Jammers • Type A -large number of oscillators -interferes large amount of communication spectrum • Type B -”Intelligent Cellular Disabler Devices” -detectors communicate with Base Station -prevent the authorization of call establishment

8. Type C -”Intelligent Beacon Disablers” -compatible terminal is disabled -eg. blue tooth technology • Type D -jammer with a receiver -jams the signal only when there is link between the base station and the mobile -less electromagnetic pollution

9. Type E -Faraday’s cage- blocks virtually all the EM waves -EMI sheilding techniques - EMI - Electro Magnetic Interface -”quiet conference rooms”

10. Minimum Requirements of Mobile Jamming • Jammer power= signal power at the receive • Jamming to signal ratio (J/S) • Distance between jammer and receiver

11. Frequency Hopping

12. Frequency Hopping

13. Components of Mobile Jammer • RF Section • Power supply • IF Section

14. RF SECTION VCO RF POWER AMPLIFIER ANTENNA

15. IF SECTION NOISE GENERATOR SIGNAL MIXER

16. Power Supply TRANSFORMER RECTIFIER FILTER REGULATOR +9V REGULATOR -9V REGULATOR +5V

17. Applications • Hostage Situations • During Drug raid • In potentially explosive areas

18. A Pocket Sized Jammer

19. 4 Frequency Band Jammer

20. Military Jammers Very High Power Jammers

21. Conclusions • High power and low power jammers • Variation in sizes • Easy to handle

22. THANK YOU

23. Any queries??