Building A Cell Phone Jammer

Is the non-stop nattering of people on their cell phones offensive to you? Are they yammering up a storm in a place that you wish they just wouldnt, like a movie theater, quiet caf or other private location? Until now, the only thing that you could do about it is confront them, which may or may not yield results. Thankfully, the same technology that loosed these annoyances on the Earth has given us a way to stop them the cell phone jammer. These devices, properly referred to as RF signal jammers, work by interfering with the radio communication between cell phones and the service towers that transmit their signals.

All you need to build a cell phone jammer at the simplest level is a transmission device that can broadcast at the same frequency as a cell phone. However, this is slightly more difficult than it seems, as phones occupy a fairly wide band of the radio spectrum, with different models and phone providers occupying different areas. The ideal cell phone jammer can move across a number of frequencies easily to interfere with all transmission and reception.

At the core of your cell phone jammer will be a voltage controlled oscillator. This is the device that creates the jamming signal. Because you want a wave that continually varies in intensity, you should set it to output a triangle waveform to do the most damage. More advanced units contain several different oscillators, each designed to attack a different region of bandwidth. One of the most popular do-it-yourself cell phone jammers, the Wave Bubble, contains two oscillators that can not only disrupt cell signals but GPS as well.

There are several methods used to find the radio band that the offensive phones are using. The most basic cell phone jammers either work on a set wavelength or have a tuning knob, like an old-fashioned radio. This can be somewhat difficult to use in the field, as you will need to observe your target to see if youve hit the right spot to wreck their call. More advanced jammers use an auto-tuning mechanism that broadcasts on a continually changing sawtooth wave, moving rapidly between frequencies to briefly disrupt channels as rapidly as possible.

Hopefully these instructions have given you the information you need to start work on your own cell phone jammer. But keep in mind that interfering with broadcast frequencies is against the law, and if you are discovered with your jammer in hand, you may want to jam on out of there, if you know what Im saying. Now if youll excuse me, I have to take this call.

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