Low-cost RF sniffer finds 2.4-GHz sources

From EDN magazine Ideas for Design:
Low-cost RF sniffer finds 2.4-GHz sources.
<http://www.edn.com/article/CA6391433.html?spacedesc=designideas&industryid=44 217>
<http://www.edn.com/contents/images/6391433f1.pdf>
The input filter can be cannibalized from any Wi-Fi device with a
ceramic bandpass filter near the antenna.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Jeff Liebermann wrote:
> From EDN magazine Ideas for Design:
> Low-cost RF sniffer finds 2.4-GHz sources.
> <http://www.edn.com/article/CA6391433.html?spacedesc=designideas&industryid=44 217>
> <http://www.edn.com/contents/images/6391433f1.pdf>
> The input filter can be cannibalized from any Wi-Fi device with a
> ceramic bandpass filter near the antenna.
>
> --
> Jeff Liebermann jeffl@comix.santa-cruz.ca.us
> 150 Felker St #D http://www.LearnByDestroying.com
> Santa Cruz CA 95060 http://802.11junk.com
> Skype: JeffLiebermann AE6KS 831-336-2558

I have one of the first generation Zap Checkers (when they were being
sold at electronics flea markets).
http://www.zapchecker.com/
I've seen these modified with a switch and SMA for external antenna
use. It seems to me adding a filter would turn the zap checker into a
wifi sniffer.