Phase center of patch antenna
 

Hi,

A question about patch antennas like the one described by K3TZ
(http://www.qsl.net/k3tz). What is the distance between the surface of the
patch and the center of phase in order to put it at the focal point of a
parabolic reflector. Maybe it is not very critical ?

Thanks for your help.
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73 Gérard F6FGZ