Help with Zone plate microwave antennas

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Article #2903

#2903

From: Geoff Thomas
Date: Wed, 15 Apr 1992 04:44

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Hi. I'm after some info on construction of a Zone plate microwave
antenna. These have been in use for a while in the UK as Direct
Broadcast satellite antennas, for satellites such as Astra, etc.

I know it has something to do with diffraction, but I'd like to
know more about them. I wish to build a few operating on different
frequencies, and make them as effecient as poss.

Any help much appreciated.

Thanks in advance,


Geoff.

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Message-ID: <1992Apr15.164429.4703@csc.canterbury.ac.nz>

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Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!waikato.ac.nz!canterbury.ac.nz!cosc.canterbury.ac.nz!geoffrey
Newsgroups: sci.electronics,rec.video.satellite
Subject: Help with Zone plate microwave antennas
Message-ID: <1992Apr15.164429.4703@csc.canterbury.ac.nz>
From: geoffrey@cosc.canterbury.ac.nz (Geoff Thomas)
Date: 15 Apr 92 16:44:27 +1200
Distribution: world
Organization: Computer Science,University of Canterbury,New Zealand
Nntp-Posting-Host: cosc.canterbury.ac.nz
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