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Maybe a stupid question...but would it be possible to use a router with some kind of linux firmware and a laptop in a car as a radar detector?

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Yes, with the right hardware. We can't help you find the right hardware here. We could help you make it work if you had driver troubles. –  Gilles Jan 29 '12 at 23:30
    
For that day when every car has a wifi connection. –  TGP1994 Jan 2 '13 at 23:33
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up vote 4 down vote accepted

No. For so many reasons. One obvious one:

802.11 = 2.4, 3.6, or 5 GHz

X band = 8-12 GHz

K band = 18-27 GHz

Ka band = 26.5 - 40 GHz

Layman's explanation of the above: The router cannot "tune" to the needed frequencies.

(Then there's the DSSS vs burst detection, etc, etc, etc...)

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yeah i figured it wouldn't be able to pick up the frequency, i just noticed somewhere that people talked about "radar detection" when discussing openwrt, it got my hopes up. you know that'd be cool though! –  Marty Jan 30 '12 at 21:27
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