Diff: biquad

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+A biquad is a compact antenna which is relatively simple to make, with very impressive performance. 

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+(http://www.trevormarshall.com/biquad.htm Trevor Marshall) has info about using the biquad as a feed for a satellite dish. 

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+However, the photos of the biquad on Trevor's site do not show the construction detail, so have a look at mpot's (http://martybugs.net/wireless/biquad/ biquad antenna construction) pages for much more datailed construction info.