Graduate Profiles 2012 - National University of Science and ...

DEVELOPMENT OF JAMMER AGAINST VHF BAND (34-176 MHZ) REMOTECONTROL IMPROVISED EXPLOSIVE DEVICESPakistan is facing a serious social and security threat against national harmony due toterrorist bombing. Terrorist often use remote control devices such as walike talkie andcordless phones etc for activation of remote controlled devices. The project will give aneasy and low cost tool for jamming of VHF band remote control devices in a selectiveregion.Originally much of the technology associated with jamming was developed for militarypurposes.A huge part of security in the military is data security, Jammingcommunications signals locally can prevent the loss of data.Some Law Enforcementagencies use Jammers to prevent criminals from communicating.Law Enforcement andmilitary both use Jammers for preventing signals from certain kinds of remote explosivedetonation devices.Jammers originally worked on analog signals eventually Jammingwas necessary on digital networks Newer Jammers will block VHF, HF, AMPS andGSM networks.The jammer that has been designed isconsisted of three major parts. The power supply,IF section, RF section. The Jammer is designed to take its power from a sourcecontinuously and convert it into the dc output voltage required to drive the circuitry. TheIF-section of the jammer is used to generate the tuning signal required in the RF-Section. The main parts of the IF-Section are Wave Generator, Noise Generator andSignal Mixer.The RF-section is responsible for generating and transmitting the RF-Jamming signal. The main parts are oscillator, Power Amplifier, and the Antenna.A prototype Jammer has been designed that will overflow the VHF frequency used bywireless phones with radio waves.Enough interference and distortion caused by thesewaves will prevent communication between a wireless media and a base tower.Syndicate Members: SulemanBilal TimimyAbid MehmoodFahad MaqsoodSupervisor:Engr Syed Muhammad Ali Abidi7