Cell Phone Jammer

1. Cell Phone Jammer By M. Swapna 09J95a0402

2. Contents • Introduction • Types of Jammer • How Jammer Works • What inside Jammer • Applications of Jammer • Future scope of Jamming Technology • Cell Phone Detector Introduction • Block Diagram • Application • Conclusion Shri Mata Vaishno Devi University, Katra

3. Introduction Cell phone jammers are devices that create a temporary "dead zone" to all cell phone traffic in their immediate proximity Shri Mata Vaishno Devi University, Katra

4. Jamming techniques • Type "A" Device: JAMMERS • Type “B” Device: INTELLIGENT CELLULAR DISABLERS • Type “C” Device: INTELLIGENT BEACON DISABLERS • Type “D” Device: DIRECT RECEIVE & TRANSMIT JAMMERS • Type “E” Device: EMI SHIELD - PASSIVE JAMMING Shri Mata Vaishno Devi University, Katra

5. How Jammer Works • A jamming device transmits - same radio frequencies of greater power as the cell phone, disrupting the communication between the phone and the cell-phone base station in the tower. It's a called a denial-of-service attack. .....Jamming basics.... Shri Mata Vaishno Devi University, Katra

6. This causes interference with communication of cell phones and towers to render the phones unusable. On most phones, the network would be out of range. • So Jammers work by either disrupting phone to tower freq.. or tower to phone frequencies. Shri Mata Vaishno Devi University, Katra

7. Design Parameters/ Specification Free space loss {F}= Path Loss (dB)= 32.44 + 20 log D(km) + 20log f(MHz) The frequency bands Distance to be jammed (D) • PjGjrGrj R2trLr Br • Jamming–to-signal ratio {J/S}= • PtGtrGrt R2jrLjBj Power calculations Shri Mata Vaishno Devi University, Katra

8. Block Diagram Power supply If section Rf section Jamming signals Shri Mata Vaishno Devi University, Katra

9. Power supply Transformer Rectifier filter Regulator Shri Mata Vaishno Devi University, Katra

10. IF section Triangular wave generator Noise generator Mixer summer “Summer” Shri Mata Vaishno Devi University, Katra

11. Rf section Voltage Controlled Oscillator Power Amplifier Antenna Shri Mata Vaishno Devi University, Katra

12. Application • To maintain the complete silence in library and lecture hall • To avoid fraud in examination hall • To avoid disturbance in class room • For providing security in business conference, board of directors rooms, seminars, etc., • For providing calm and peaceful atmosphere in Hospitals • Church/Mosques/Cathedral/Temple/Religious establishment Shri Mata Vaishno Devi University, Katra

13. Future scope of Jamming Technology • While the law clearly prohibits using a device to actively disrupt a cell-phone signal, there are no rules against passive cell-phone blocking. • Companies are working on devices that control a cell phone but do not "jam the signal. Shri Mata Vaishno Devi University, Katra

14. Cell phone detector Introduction Shri Mata Vaishno Devi University, Katra

15. Block Diagram Shri Mata Vaishno Devi University, Katra

16. Applications • Cell-phone alerter (detector) is useful that indicate the presence of a cell-phone signal. These can be used in hospitals where cell-phone signals could interfere with sensitive medical equipment. When a signal is detected, users are asked to turn off their phones or Jamming can be used. • It is useful airport. • It is useful in class rooms and examination hall. • It is useful wherever cell phone can disturb. Shri Mata Vaishno Devi University, Katra

17. Conclusion • Every technology has good aspect as well as bad aspect the important thing is ,how we are using it. • Cell phone jammers are very useful to the society from the anti-social elements. We can save our national leaders. we can restrict the communication network between the anti-social elements by using the cell phone jammers. Cell phone jammers prevent the students from carrying cell phones to the colleges. As every thing goes fine, it is very necessary to implement in all the colleges References • [1] www.HowStuffWorks.com • [2] en.wikipedia.org/wiki/Mobile_phone_jammer Shri Mata Vaishno Devi University, Katra

18. QUERIES Shri Mata Vaishno Devi University, Katra

19. Shri Mata Vaishno Devi University, Katra