By                 Shishu Priya Darshi                     2007EEC08                   Naresh Prasad                     2...
Contents Introduction Types of Jammer How Jammer Works What inside Jammer Applications of Jammer Future scope of Jam...
Cell phone jammers are devices that create atemporary "dead zone" to all cell phone traffic intheir immediate proximity   ...
Jamming techniques Type "A" Device: JAMMERS Type “B” Device: INTELLIGENT CELLULAR DISABLERS Type “C” Device: INTELLIGEN...
How Jammer Works A jamming device transmits - same radio  frequencies of greater power as the cell phone,  disrupting the...
 This causes interference with communication of  cell phones and towers to render the phones  unusable. On most phones, t...
Design Parameters/ Specification The frequency bands Distance to be jammed (D)                                          Pj...
Block Diagram                                                                  Jamming Power supply        If section     ...
Power supplyTransformer                  Rectifier                        filter   Regulator              Shri Mata Vaishn...
IF section Triangular wave                                                              Mixer summer    generator         ...
Rf section   Voltage  Controlled                Power Amplifier               Antenna  Oscillator               Shri Mata ...
Application To maintain the complete silence in library and lecture hall To avoid fraud in examination hall To avoid di...
Future scope of Jamming Technology  While the law clearly prohibits using a device to   actively disrupt a cell-phone sig...
Cell phone detector     Introduction     Shri Mata Vaishno Devi University, Katra   14
Block Diagram Power       I.F                             RF                                                     Signal Su...
Applications Cell-phone alerter (detector) is useful that  indicate the presence of a cell-phone signal. These  can be us...
Conclusion Every technology has good aspect as well as bad aspect the  important thing is ,how we are using it. Cell pho...
QUERIES    QUERIES  Shri Mata Vaishno Devi University, Katra   18
THANK YOUShri Mata Vaishno Devi University, Katra   19
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Cellphonejammerppt 101216030013-phpapp01

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Cellphonejammerppt 101216030013-phpapp01

  1. 1. By Shishu Priya Darshi 2007EEC08 Naresh Prasad 2007EEC67Department of Electronics & Communication Engineering Shri Mata Vaishno Devi University, Katra 1
  2. 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 2
  3. 3. Cell phone jammers are devices that create atemporary "dead zone" to all cell phone traffic intheir immediate proximity Shri Mata Vaishno Devi University, Katra 3
  4. 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 4
  5. 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. Its a called a denial-of-service attack. .....Jamming basics.... Shri Mata Vaishno Devi University, Katra 5
  6. 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 6
  7. 7. Design Parameters/ Specification The frequency bands Distance to be jammed (D) Pj Gjr Grj R2tr Lr Br Jamming–to-signal ratio {J/S}= Pt Gtr Grt R2jr Lj Bj Free space loss {F}= Path Loss (dB)= 32.44 + 20 log D(km) + 20log f(MHz) Power calculations Shri Mata Vaishno Devi University, Katra 7
  8. 8. Block Diagram Jamming Power supply If section Rf section signals Shri Mata Vaishno Devi University, Katra 8
  9. 9. Power supplyTransformer Rectifier filter Regulator Shri Mata Vaishno Devi University, Katra 9
  10. 10. IF section Triangular wave Mixer summer generator Noise generator “Summer” Shri Mata Vaishno Devi University, Katra 10
  11. 11. Rf section Voltage Controlled Power Amplifier Antenna Oscillator Shri Mata Vaishno Devi University, Katra 11
  12. 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 12
  13. 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 13
  14. 14. Cell phone detector Introduction Shri Mata Vaishno Devi University, Katra 14
  15. 15. Block Diagram Power I.F RF Signal Supply Section Section Shri Mata Vaishno Devi University, Katra 15
  16. 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 16
  17. 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 collegesReferences [1] www.HowStuffWorks.com [2] en.wikipedia.org/wiki/Mobile_phone_jammer Shri Mata Vaishno Devi University, Katra 17
  18. 18. QUERIES QUERIES Shri Mata Vaishno Devi University, Katra 18
  19. 19. THANK YOUShri Mata Vaishno Devi University, Katra 19

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