|
GPS Jamming is not very expensive. You do not need to pay US$1500 to buy a
jammer when it is simple to build one for about US$5. The problem is that
GPS satellites do nopt transmit much power and are therefore very easally
jammed.
Jamming GPS in a local area involes generating a carrier in the region of
1575 MHz. The aim is to use high power to overcome the cost of the design,
and to obercome the weak satellites.
Common GPS jammers operate using a crystal frequency standard to ensure that
the frequency of jamming is correct. Since Jamming GPS is illegal, why
bother about using the exact frequency.
We can then use a much simpler circuit. Something like a MAR-6 or ERA-3 MMIC
Amplifier from Minicircuits. Simple get one of these parts, and connect it
to power. Connect the output to the input through a piece of CoAx and an
optional resistor divider to reduce the feedback power. The length of the
coax should be about half an electrical wavelength and can be adjusted to
set the exact frequency.
If you like you can also add another amplifier on the output to ensure
maximum output power.
Remember that consumer GPS receivrs operate on a different frequency from
the military ones. This page has only been written to show how much of a
rip-off the commercial jammers are, not to encourage their use.
____
Welcome to our Techical Site. If you are interested in an overview, then visit our
Marketing Site
Copyright © 1994-2005
Radioactive Networks ,
darryl@radio-active.net.au
This page was last updated 2005-08-31 13:27:57
This page was last compiled 2005-11-15 18:51:21
Question or Comment? Click
here
|
