In alt.internet.wireless DaveC wrote:
DirectTV 20" dish, offset fed, f/d~0.7, to be used for 2.4 GHz wlan link.

I've looked at all types of feeds, from cantennas to bi-quads to patch to
dual-dipole. All have their pros and cons.

The Trevor Marshall BiQuad is the most referenced feed for a dish.
http://martybugs.net/wireless/biquad/ refers to Trevor's site, and has
better instructions and pictures.

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Clarence A Dold - Hidden Valley (Lake County) CA USA 38.8,-122.5