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cell phone jammer report

  1. 1. A Term Paper On CELL PHONE JAMMER Submitted by: Sameer Gupta B.Tech (E&C), III Semester Under the Guidance of Ms. Sally Goyal Amity School of EngineeringAMITY UNIVERSITY RAJASTHAN 1
  2. 2. CERTIFICATEThis is to certify that the Report entitled Cell Phone jammersubmitted by Sameer Gupta with Enrolment No.A20405110036on October 2011 is his own work and has been carried out undermy supervision. It is recommended that the candidate may nowbe evaluated for his work by the University.(STUDENT) (GUIDE)Signature: Signature: Designation: Date: 2
  3. 3. ACKNOWLEDGEMENTThe completion of any task is not only the reward to the persons activelyinvolved in accomplishing it, but also the people involved in inspiring,guiding and helping those people.I take opportunity here to thank all those who have helped me in the completion ofthis seminar, without whom the seminar indeed would have been, quite a difficulttask.I would like to express my deepest gratitude to my Mentor,Ms. Sally Goyal for his able guidance during the course of preparation of thisseminar. B.Tech. Second Year Electronics and communication Engg. 3
  4. 4. ------------Index------------1. Abstract-----------------------------------------------------52. History------------------------------------------------------63. Introduction to cell phone jammer---------------------84. Cell phone jamming basics------------------------------85. Cell phone jammer device-------------------------------86. Design Parameters----------------------------------------97. Component cell phone jammer-------------------------11 7.1 Power supply--------------------------------------11 7.2 Circuitry--------------------------------------------12 7.3 Antenna---------------------------------------------128. How cell phone jammer work---------------------------129. jamming techniques---------------------------------------1310. Types of cell phone jammer device---------------------1411. Cell phone jammer applications-------------------------1912. Cell phone jammer legal issues--------------------------2013. Alternatives to cell phone jamming---------------------2114. Conclusion--------------------------------------------------2215. Bibliography------------------------------------------------23 4
  5. 5. 1. AbstractThe last few years have witnessed a dramatic boom in the wireless communications industry,hence increasing the number of users of mobile communication devices. This magnified the needfor a more efficient and reliable signal scrambler. This paper deals with the Mobile JammingTechnology. The concept of jamming technology is studied in a step-by-step approach. Themobile jammer in the frequency range of 890MHz to 960MHz (GSM) is developed. Its circuitanalysis simulation is performed using Speace-spice Software. Antenna simulation is done byusing IE3D software [8]. The jammer circuit is designed with minimum cost and high efficiency.The jammer jams the signal within five meter effective radius. Index terms– Antenna, Jammer,Wide band frequency. 5
  6. 6. 2. HistoryThe rapid proliferation of cell phones at the beginning of 21st century to near ubiquitous statuseventually raised problems such as their potential use of invade privacy or contribute to rampantand egregious academic cheating. In addition public black lash privacy or contribute to rampant The rapid proliferation of cell phones at the beginning of the 21st century to nearubiquitous status eventually raised problems such as their potential use to invade privacy orcontribute to rampant and egregious academic cheating. In addition public backlash was growingagainst the intrusive disruption cell phones introduced in daily life. While older analog cellphones often suffered from chronically poor reception and could even be disconnected by simpleinterference such as high frequency noise, increasingly sophisticated digital phones have led tomore elaborate counters. Cell phone jamming devices are an alternative to more expensivemeasures against cell phones, such as Faraday cages, which are mostly suitable as built inprotection for structures. They were originally developed for law enforcement and the military tointerrupt communications by criminals and terrorists. Some were also designed to foil the use ofcertain remotely detonated explosives. The civilian applications were apparent, so over timemany companies originally contracted to design jammers for government use switched over tosell these devices to private entities. Since then, there has been a slow but steady increase in theirpurchase and use, especially in major metropolitan areas. 6
  7. 7. Cell phone jammer Device 7
  8. 8. 3. Introduction to cell phone jammer Cell phones are everywhere these days. According to the Cellular Telecommunicationsand Internet Association, almost 195 million people in the United States had cell-phone servicein October 2005. And cell phones are even more ubiquitous in Europe. Its great to be able to call anyone at anytime. Unfortunately, restaurants, movie theaters,concerts, shopping malls and churches all suffer from the spread of cell phones because not allcell-phone users know when to stop talking. Who hasnt seethed through one side of aconversation about an incredibly personal situation as the talker shares intimate details with hisfriend as well as everyone else in the area? While most of us just grumble and move on, some people are actually going to extremesto retaliate. Cell phones are basically handheld two-way radios. And like any radio, the signalcan be disrupted, or jammed. 4. Cell Phone Jamming Basics Disrupting a cell phone is the same as jamming any other type of radio communication.A cell phone works by communicating with the service network through a cell toweras basestation. Cell towers divide a city into small areas,or cells. As a cell phone user drives down thestreet, the signal is handed from tower to tower. Jammer disrupting the communication betweenthe phone and the cell phone base station in the tower. It’s called denial-of-service attack. The jammer denies service of the radio spectrum to the cell phone users within range ofthe jamming device as shown in figure bellow. 5. Cell Phone Jamming Device Jamming devices overpower the cell phone by transmitting a signal on the samefrequency and at a high enough power that the two signals collide and cancel each other out. 8
  9. 9. Cell phones are designed to add power if they experience low-level interference, so thejammer must recognize and match the power increase from the phone. Cell phones are full-duplex devices, which means they use two separate frequencies, onefor talking and one for listening simultaneously. Some jammers block only one of thefrequencies used by cell phones, which has the effect of blocking both. The phone is tricked intothinking there is no service because it can receive only one of the frequencies. Less complex devices block only one group of frequencies, while sophisticated jammerscan block several types of networks at once to head off dual-mode or tri-mode phones thatautomatically switch among different network types to find an open signal. Some of the high-enddevices block all frequencies at once, and others can be tuned to specific frequencies. To jam a cell phone, all you need is a device that broadcasts on the correct frequencies.Although different cellular systems process signals differently, all cell-phone networks use radiosignals that can be interrupted. GSM, used in digital cellular and PCS-based systems, operates inthe 900-MHz and 1800-MHz bands in Europe and Asia and in the 1900-MHz (sometimesreferred to as 1.9-GHz) band in the United States. Jammers can broadcast on any frequency andare effective against AMPS, CDMA, TDMA, GSM, PCS, DCS, iDEN and Nextel systems. Old-fashioned analog cell phones and todays digital devices are equally susceptible to jamming. The actual range of the jammer depends on its power and the local environment, whichmay include hills or walls of a building that block the jamming signal. Low-powered jammersblock calls in a range of about 30 feet (9 m). Higher-powered units create a cell-free zone aslarge as a football field. Units used by law enforcement can shut down service up to 1 mile (1.6km) from the device. 6. Design Parameters Based on the above, our device which is related to the DOS technique is transmittingnoise on the same frequencies of the two bands GSM 900 MHz, and GSM 1.8 GHz (known also 9
  10. 10. as DCS 1800 band). We focused on some design parameters to establish the devicespecifications. These parameters are as follows:6.1 The distance to be jammed (D)This parameter is very important in our design, since the amount of the output power of thejammer depends on the area that we need to jam. Later on we will see the relationship betweenthe output power and the distance D. Our design is established upon D=10 meters for DCS 1800band and D=20 meters for GSM 900 band.6.2 The frequency bands UPLINK DOWNLINK USED IN (Handset (Handset JORDAN transmit) receive) BY: GSM 900 890-915 935-960 Zain + Orange MHz MHzDCS 1800 1710-1785 1805-1880 Umniah MHz MHz 10
  11. 11. 6.3 Jamming–to-signal ratio {J/S} Jamming is successful when the jamming signal denies the usability of thecommunication transmission. In digital communications, the usability is denied when the errorrate of the transmission can not be compensated by error correction. Usually, a successfuljamming attack requires that the jammer power is roughly equal to signal power at the receiver(mobile device).The general equation of the jamming-to-signal ratio is given as follows:where: Pj=jammer power, Gjr= antenna gain from jammer to receiver, Grj=antenna gain fromreceiver to jammer, Rtr=range between communication transmitter and receiver,Br=communication receiver bandwidth, Lr =communication signal loss, Pt=transmitter power,Gtr= antenna gain from transmitter to receiver, Grt=antenna gain from receiver to transmitter,Rjr=range between jammer and communication receiver, Bj=jammer bandwidth, andLj=jamming signal loss.For GSM, the specified system SNRmin is 9 dB which will be used as the worst case scenariofor the jammer. The maximum power at the mobile device Pr is -15 dBm. 6.4 Free space loss {F}The free-space loss (or path loss) is given by:The maximum free space loss (worst case F) happens when the maximum frequency is used inthe above equation. Using 1880 MHz gives:F (dB) =32.44+20 log 0.01 + 20 log 1880 which gives F =58 dB. 7. Component of Cell Phone Jammers Electronically speaking, cell-phone jammers are very basic devices. The simplest just havean on/off switch and a light that indicates its on. More complex devices have switches to activatejamming at different frequencies. Components of a jammer include: 11
  12. 12. 7.1 Power supply Smaller jamming devices are battery operated. Some look like cell phone and use cell-phonebatteries. Stronger devices can be plugged into a standard outlet or wired into a vehicleselectrical system. 7.2 Circuitry The main electronic components of a jammer are: 7.2.1 Voltage-controlled oscillator - Generates the radio signal that will interfere with the cell phone signal 7.2.2. Tuning circuit - Controls the frequency at which the jammer broadcasts its signal by sending a particular voltage to the oscillator 7.2.3 Noise generator - Produces random electronic output in a specified frequency range to jam the cell-phone network signal (part of the tuning circuit) 7.2.4 RF amplification (gain stage) - Boosts the power of the radio frequency output to high enough levels to jam a signal 7.2.5 Check your phone - If the battery on your phone is okay, and youd like to continue your conversation, try walking away from the area. You may be able to get out of the jammers range with just a few steps. 7.3 Antenna Every jamming device has an antenna to send the signal. Some are contained rical cabinet. On stronger devices, antennas are external to provide longer range and may be tuned for individual frequencies. 12
  13. 13. 8. How Cell Phone Jammers Work Cell phone jammers work in a similar way to radio jammers by sending out the sameradio frequencies that cell phones operate on. Doing so creates enough interference so that a callcannot connect with a cell phone. There are two types of cell phone jammers currently available.The first type are usually smaller devices that block the signals coming from cell phone towers toindividual cell phones. The frequency blocked is somewhere between 800MHz and 1900MHz.Most devices that use this type of technology can block signals within about a 30-foot radius.Cell phones within this range simply show no signal. The second type of cell phone jammer is usually much larger in size and more powerful.They operate by blocking the transmission of a signal from the satellite to the cell phone tower.Some powerful models can block cell phone transmissions within a 5 mile radius. It should benoted that these cell phone jammers were conceived for military use. Once again, it should be noted that operating or even owning a cell phone jammer isillegal in most municipalities and specifically so in the United States. Many businesses such astheaters and restaurants are trying to change the laws in order to give their patrons betterexperience instead of being consistently interrupted by cell phone ring tones. 9. Jamming techniques9.1 Type “A” Device (JAMMERS):This type of device comes equipped with several independent oscillators transmitting ’jammingsignals’ capable of blocking frequencies used by paging devices as well as those used by cellularsystems control channels for call establishment. 13
  14. 14. 9.2 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 uniqueidentification number for communicating with the cellular base station.9.3 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 anycompatible terminal is instructed to disable its ringer or disable its operation, while within thecoverage area of beacon.9.4 Type “D” Device (Direct Receive & Transmit Jammers):This jammer behaves like a small, independent and portable base station, which can directlyinteract intelligently or unintelligently with the operation of the local mobile phone. The jammeris predominantly in receive mode and will intelligently choose to interact and block the cellPhone directly if it is within close proximity of the jammer.9.5 Type E Device (EMI Shield - Passive Jamming):This technique is using EMI suppression techniques to make a room into what is called Faradaycage. Although labor intensive to construct, the Faraday cage essentially Blocks or greatlyattenuates, virtually all electromagnetic radiation from entering or leaving the cage - or in thiscase a target room. 10. 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 14
  15. 15. station and jamming device. resulting it disconnect the cell from base station .and wecan not recive the any calls from base station. For this there are many types of cell phone jammer devices which is given as below:o cell phone jammero Portable cell phone jammero Remote control cell phone jammero Adjustable cell phone jammero School &prison phone jammero Explosion-proof cell phone jammero Police &military phone jammer One of the cell phone jammer device is “single knight brand ultra-thin cell phone jammer” Model: SK-6 Ultra-thin Cell phone Jammer Introduction: SK-6 cell phone jammer is more and more popular used in examination halls, examination rooms, test rooms, libraries and so on. The cell phone jammer is the best instrument can help examiners to prevent students cheating with cellular phones in the examinations. SK-6 cell phone jammer is the latest electronic product which transmits low power radio signals to block the communication signal bandwidths in GSM, CDMA, PHS, DCS, IDEN, UMTS, GPS, WiFi, Bluetooth, etc. Beijing Signal Knight is a professional cell phone jammer manufacturer based in China Beijing; we can design and develop any types of cell phone jammers for different clients’ demands. Nowadays, the cell phone jammer has become the necessity for schools, universities, testing centers, and so on. 15
  16. 16. Features of SK-6 Cell phone Jammer Show the working power on the shell with green lights Prevent cheating by using cellphone in the examinations Keeping you away from the noise or disturbance of unexpected cellphone calls or SMS in the class time or meeting time. Mini-size medium power cellphone jammer Low weight and Nice texture and color To block wireless phone communication links within an effective area. No transmissions or receptions of cellphone call in coverage area. All specified frequency bands will be blocked simultaneously. How to Install: 1. Install this device at the height about 1.5-1.7m will get the best jamming result, keep all the antennas in vertical. 2. Never install this device close to the wall; the wall will affect the interference signals. Put this device 30-50cm away from the wall. 3. One set of this device can block all types of cellular system including analog (AMPS, TACS, NMT) and digital (GSM, DCS, PDC, TDMA, PHS, PCS, iDEN, CDMA, WCDMA) signals up to 30m radius, covers an individual room of around 2800 square meters. 4. To cover an area bigger than 2800 square meters, please install multiples of this device to ensure better jamming effect, e.g. in an individual space of 3500 square meters, you should need to install 2 or more devices working together. 5. This device is not able to cover different spaces divided with walls. Install individual jammers in different partition of a building to ensure the best jamming effect. 16
  17. 17. Specification: SK-6 Ultra-thin Cellphone Jammer SPECIFICATION 0.5meters to 30meters Jamming Area (Depends on signal strength, at the site to be jammed) Output Frequency Option A for Asian Market CDMA 860-894MHz GSM 925-960MHz PHS 1900-1925MHz 3G 1990-2170MHz Option B for Europe Market CDMA 860-894Mhz Cellular Systems GSM 925-960MHz DCS 1805-1850MHz 3G 1990-2170MHz Option C for American Market CDMA 850-894Mhz GSM900 920-960Mhz GSM1800 1710-1880MHz CDMA2000, 3G 1990-2170Mhz Power Adapter Input AC160V-240V, DC5VTotal Output Power 8Watt Product Antennas off: L 23x W 9 x H 2 cm Package: L Dimension 29x W 15x H 11 cm Weight Product weight:0.2kg Package weight: 1.5kg Accessory 1 power adapter, 1 jammer, 4 antennas Working Time 12 hours/ Day Relative Humidity 20%--95% Working -40~ +55 deg C Temperature Install the antennas corresponding to the channel label. If not,Antennas installation the jammer will be very hot when it works. 17
  18. 18. How to operate the SK-6 Cellphone Jammer:1. Install the antennas fully correctly in vertical firstly.2. Plug the power adaptor into the electricity outlet (110V-240V)3. Before turn on the power switch, always check if the antennas are installed securely. If you turn on the power switch without the antennas installed on this device, it shall heavily damage this device. Never remove the antennas when the device is working; otherwise you will void the warranty.Notice of Use SK-6 Cell phone Jammer: Be sure to connect all the antennas firstly before the power supply is switch on. Please donot take off antennas when the machine is working. Otherwise, it should cause heavy damage tothe device and cause the device out of work. It will also void warranty. Antennas shall be used vertical to the ground, working more efficiently. Please don’t put the jammer in the water and fire to avoid using in the bad. Condition ofover-wet, over-hot, high-voltage and high magnetism.Use several units in the same place will get bigger coverage area. For better performance indoors, use this device in an individual space. The device is notable to cover different spaces divided with walls. Install individual jammer in different partitionof a building to ensure the best jamming result. The jamming area is influenced by the location of the cell tower and the obstaclesbetween cell tower & the cell phone jammer. It means that in normal condition if the distance isclose between the cell tower & the cell phone jammer, it will have very less jamming area. 18
  19. 19. Likewise, if there are obstacles & walls between the cell tower & the cell phone, the cell phonejammer will give less jamming area. Usually, at the same place, you will get longer jamming distance indoor, because the walland floor will reduce the base station signal strength.Any ruin and disrepair caused by incorrect operation and disassembly will exclude from therepair with free of charge.1. Unauthorized repair or dismantle of this device will void all the warranties.2. Antennas shall be used vertical to the ground, working more efficiently.3. Please do not take off antennas when the machine is working. Otherwise, it should cause heavy damage to the device and cause the device out of work. It will also void warranty.4. Install the antennas before switch on the device, otherwise will heavy damage the jammer.5. Persons with Pacemaker implants are prohibited from using this device.6. Avoid water; over-wet, over-hot, high-voltage and high magnetism.7. Do not store this device in an excessively hot place.8. Avoid knocks or dropping this device. Effect is worse in outdoor. Strictly speaking, whether using indoor or outdoor, the effective distance of interference is related to the surrounding around, for example the distance between different base stations, positions of installation etc. 11. Cell Phone Jammer Applications Cell phone jamming devices were originally developed for law enforcement and themilitary to interrupt communications by criminals and terrorists. The bombs that blew upcommuter trains in Spain in March 2004, as well as blasts in Bali in October 2002 and Jakarta in 19
  20. 20. August 2003, all relied on cell phones to trigger explosives. It has been widely reported that acell-phone jammer thwarted an assassination attempt on Pakistani President Musharraf inDecember 2003. When President Bush visited London in November 2004, it was reported thatBritish police considered using jammers to protect the presidents motorcade through London. During a hostage situation, police can control when and where a captor can make a phonecall. Police can block phone calls during a drug raid so suspects cant communicate outside thearea. Cell-phone jammers can be used in areas where radio transmissions are dangerous, (areaswith a potentially explosive atmosphere), such as chemical storage facilities or grain elevators.The TRJ-89 jammer from Antenna System & Supplies Inc. carries its own electrical generatorand can block cellular communications in a 5-mile (8-km) radius.Corporations use jammers to stop corporate espionage by blocking voice transmissions andphoto transmissions from camera phones. On the more questionable end of the legitimacyspectrum, there are rumors that hotel chains install jammers to block guests cell-phone usageand force them to use in-room phones at high rates. 12. Cell Phone Jamming Legal Issues In the United States, United Kingdom, Australia and many other countries, blocking cell-phone services (as well as any other electronic transmissions) is against the law. In the UnitedStates, cell-phone jamming is covered under the Communications Act of 1934, which prohibitspeople from "willfully or maliciously interfering with the radio communications of any stationlicensed or authorized" to operate. In fact, the "manufacture, importation, sale or offer for sale,including advertising, of devices designed to block or jam wireless transmissions is prohibited"as well. Jamming is seen as property theft, because a private company has purchased the rightsto the radio spectrum, and jamming the spectrum is akin to stealing the property the company haspurchased. It also represents a safety hazard because jamming blocks all calls in the area, not 20
  21. 21. just the annoying ones. Jamming a signal could block the call of a babysitter frantically trying tocontact a parent or a someone trying to call for an ambulance. The Federal Communications Commission is charged with enforcing jamming laws.However, the agency has not yet prosecuted anyone for cell-phone jamming. Under the U.S.rules, fines for a first offense can range as high as $11,000 for each violation or imprisonment forup to one year, and the device used may also be seized and forfeited to the government. In most countries, it is illegal for private citizens to jam cell-phone transmission, butsome countries are allowing businesses and government organizations to install jammers in areaswhere cell-phone use is seen as a public nuisance. In December 2004, France legalized cell-phone jammers in movie theaters, concert halls and other places with performances. France isfinalizing technology that will let calls to emergency services go through. India has installedjammers in parliament and some prisons. It has been reported that universities in Italy haveadopted the technology to prevent cheating. Students were taking photos of tests with theircamera phones and sending them to classmates. With phones ringing in movies, weddings and classrooms, its no wonder people want totone down the intrusion. So what legally can be done to stop annoying cell-phone use? 13. Alternatives to Cell Phone Jamming While the law clearly prohibits using a device to actively disrupt a cell-phone signal, thereare no rules against passive cell-phone blocking. That means using things like wallpaper orbuilding materials embedded with metal fragments to prevent cell-phone signals from reachinginside or outside the room. Some buildings have designs that block radio signals by accident dueto thick concrete walls or a steel skeleton. Companies are working on devices that control a cell phone but do not "jam the signal."One device sends incoming calls to voicemail and blocks outgoing calls. The argument is thatthe phone still works, so it is technically not being jammed. It is a legal gray area that has notbeen ruled on by the FCC as of Apr-+il 2005. 21
  22. 22. Cell-phone alerters are available that indicate the presence of a cell-phone signal. Thesehave been used in hospitals where cell-phone signals could interfere with sensitive medicalequipment. When a signal is detected, users are asked to turn off their phones. For a less technical solution, Coudal Partners, a design firm in Chicago, has launched theSHHH, the Society for HandHeld Hushing. At its Web site, you can download a note to handto people conducting annoying cell-phone conversations, expressing your lack of interest in whattheyre talking about. 22
  23. 23. 14. ConclusionOn observing the output of the frequency spectrum the VCO output is varies from 890MHz to960MHz. This output is fed to MMG3001 and it is found that the mobile jammer blocks themobile signal in 8-meter effective radius. All the circuit output are constructed and observedusing the Electronic work bench. The simulation result and practical result are found to beapprobatory equal. The gain of the project is that we are able to block communication cominginto and going out from a GSM phone operating on the 890MHz to 960MHz frequency band.We are also able to reach 8-meter effective blocking radius and keep the cost less. At last we can say every device is acts as good aspects as well as bad aspects. In manyplace cell phone jammer is useful but at many place it is a problem .for this we can take aexample that if at any place cell phone jammer is on than anybody wants to use than therecreates some problems. But it’s overall performance is very good and helpful in our life. 23
  24. 24. 15. Bibliography www.HowStuffWork.com En.wikipedia.org/wiki/Mobile_phone _jammer Multitopic conference,2008.INMIC 2008.IEEE International "Zone of silence [cell phone jammer]," Spectrum, IEEE , vol.42, no.5, 18, May 2005 Sami Azzam, Ahmad Hijazi, Ali Mahmoudy. ”Smart Jammer for mobile phone systems” Mobile & Personal Communications Committee of the Radio Advisory Board of Canada, “Use of jammer and disabler Devices for blocking PCS, Cellular & Related Services” "Zone of silence [cell phone jammer]," Spectrum, IEEE , vol.42, no.5, 18, May 2005 G. K. H. Lui and R. D. Murch, Compact dual frequency PIFA designs using LC resonators, IEEE Trans Antennas Propagat., vol. 49, pp. 10161019, July 2001. M. T. Huynh and W. L. Stutzman, Ground plane effects on PIFA antennas, USNC/URSI Radio Science.Meeting Digest, p. 223, 2000. IE3D, Zeland Software. IE3D Users Manual Release 8, Zeland Software Incorporated. M. Ali, S. S. Stuchly, and K. Caputa, A wide band dual meandersleeve antenna, J. Electromagn. Waves 24
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