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MOBILE JAMMERS

MOBILE JAMMERS. Submitted By: PVS Soumya [2/4] Sai Nandini T [2/4] GNITS GNITS. Contents. Introduction Basic Principle Types of mobile Jamming Mobile Jamming Requirements Components of GSM Mobile Jammer Applications Advantages Conclusion.

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MOBILE JAMMERS

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  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??

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