Mobile jammer
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The document discusses mobile phone jammers, including what they are, how they work, different types, and applications. Mobile jammers transmit signals that block the communication between mobile phones and cell towers, rendering phones unusable. The document outlines five main jamming techniques (A through E), provides a sample block diagram, and discusses potential future applications while noting legal restrictions.
Mobile jammer
- 1. MOBILE JAMMER Presented By :- Avay Minni Debaditya Sarkar Rajesh Kumar Mahto Rashmi Saha 1
- 2. Content What is Mobile Jammer? History. How Mobile Jammer works? Jamming Techniques. Design Parameters/Specification. Block Diagram. Power Supply. Types of Jammer Device. Application. Future scope of Jamming Technology. Conclusion. Bibliography. 2
- 3. What is Mobile Jammer? A mobile phone jammer is an instrument used to prevent cellular phones from receiving signals from base stations. It is a device that transmit signal on the same frequency at which the GSM system operates, the jamming success when the mobile phones in the area where the jammer is located are disabled. 3
- 4. History Mobile Jammer were originally developed for law enforcement and the military to interrupt communications by criminals and terrorists. Some were also designed to foil the use of certain remotely detonated explosives. 4
- 5. How Mobile 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. 5
- 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. 6
- 7. 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 7
- 8. Jamming Techniques 1. Type "A" Device: JAMMERS This type of device comes equipped with several independent oscillators transmitting ’jamming signals’ capable of blocking frequencies used by paging devices as well as those used by cellular systems control channels for call establishment. 8
- 9. Jamming Techniques 2.Type “B” Device: INTELLIGENT CELLULAR DISABLERS Unlike jammers, Type ”B” devices do not transmit an interfering signal on the control channels. The device, when located in a designated ’quite’ area, functions as a ’detector’. It has a unique identification number for communicating with the cellular base station. 9
- 10. Jamming Techniques 3. Type “C” Device (Intelligent Beacon Disablers) Unlike jammers, Type C devices do not transmit an interfering signal on the control channels. The device, when located in a designated ’quiet’ area, functions as a ’beacon’ and any compatible terminal is instructed to disable its ringer or disable its operation, while within the coverage area of beacon. 10
- 11. Jamming Techniques 4. Type “D” Device (Direct Receive & Transmit Jammers) This jammer behaves like a small, independent and portable base station, which can directly interact intelligently or unintelligently with the operation of the local mobile phone. The jammer is predominantly in receive mode and will intelligently choose to interact and block the cell Phone directly if it is within close proximity of the jammer. 11
- 12. Jamming Techniques 5. Type E Device (EMI Shield - Passive Jamming) This technique is using EMI suppression techniques to make a room into what is called Faraday cage. Although labor intensive to construct, the Faraday cage essentially Blocks or greatly attenuates, virtually all electromagnetic radiation from entering or leaving the cage - or in this case a target room. 12
- 13. Design Parameters/Specification The frequency bands Distance to be jammed (D) Free space loss {F}= Path Loss (dB)= 32.44 + 20 log D(km) + 20log f(MHz) Power calculations 13
- 14. Block Diagram Power Jamming If section Rf section supply signals 14
- 15. Power Supply Transformer Rectifier filter Regulator 15
- 16. Contd. Mobile Jammer Amity university rajasthan 16
- 17. Types of Jammer Device Types of cell phone jammer device. There are many types of cell phone jammer device which is used in our daily life .as we take a example of class room, where we does not want to use of cell phone than there we can use cell phone jammer device. By this we can produce the interface between the cell phone base station and cell phone. resulting it disconnect the cell from base station. and we can not receive the any calls from base station. For this there are many types of cell phone jammer devices which is given as below: 17
- 18. Remote Control Mobile jammer Adjustable Mobile Jammer School &Prison Mobile Jammer Explosion – Proof Mobile jammer Police & Military Mobile Jammer Portable Mobile Jammer 18
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- 20. 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/Relig ious establishment 20
- 21. 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. 21
- 22. 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 Mobile jammers. Cell phone jammers prevent the students from carrying cell phones to the colleges. 22