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HIGHWAY RADAR JAMMING
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HIGHWAY RADAR JAMMING
Most drivers wanting to make better time on the open road
will arm them selves with an expensive radar detector.
However this device will not work against a gun type radar
unit in which the radar signal is not present until the cop
has you car in his sights and pull the trigger. Then it is
too late to slow down. A better method is to continously jam
any signal with a radar signal of your own. I have tested
this idea with the cooperation of a local cop and found that
his unit reads random numbers when your car approached him.
It is suprisingly easy to make a low power radar transmitter.
A nifty little semiconductor called a Gunn diode will
generate microwaves when supplied with 5 to 10 vdc and
enclosed in the correct size cavity (resonator). An 8 to 3
terminal regulator can be used to get this voltage from a
car's system. H owever the correct construction and tuning of
the cavity is difficult without good microwave measurement
equipment. Police radars commonly operate on the K band at 22
ghz. or more often on the X band at 10.525 ghz. Most
microwave intruder alarms and moti on detectors (mounted over
automatic doors in supermarkets, etc. ) contain a Gunn type
transmitter/receiver combination that transmits about 10
milliwatts at 10.525 ghz. These units work perfectly as
jammers. If you can't get one locally write to Microwave
Associates in Burlington, Mass. and ask for info on "Gunnplexe
rs" for ham radio use. When you get the unit it may be mounted
in a plastic box on the dash or in a weatherproof enclosure
behi nd the plastic grille. Switch on the power when on the
open hig hway. The unit will not jam radar to the side or
behind the car so don't go speeding past the radar trap. An
interesting phenomena you will notice is that drivers in
front of you who are u sing detectors will hit their brakes as
you approach large metal signs or bridges. Your signal is
bouncing off these objects and triggering their detectors.
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