1. Submitted By: PVS Soumya [2/4] Sai Nandini T [2/4] GNITS GNITS
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. -”quiet conference rooms”
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

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

18. A Pocket Sized Jammer

19. 4 Frequency Band Jammer

20. Very High Power Jammers
Military Jammers

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

22. THANK YOU

23. Any queries??