Prodelin / GD Satcom antennas and ABCD measurments

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Admin1 YaBB Admin ★★★★★ Offline Posts: 1203	Jan 31^st, 2012 at 11:03am I have found this page: -- broken link - which lists all the pdf documents providing the reference ABCD measurements for the feed positions of all Prodelin antennas. Best regards, Eric.
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Reply #1 - Sep 30^th, 2023 at 9:46am

The best document I can find, dated 2014 is:

https://www.satsig.net/prodelin/TD0641-May-2014-Rev-N.pdf

This provides the ABCD measurements for many Prodelin/ GD Satcom antennas.

In each case the phase centre (or focal point) will be somewhere in the feed, but on the axis of the feed. It varies according to design of feed, thus multiple ABCD measurements for different frequencies.

I hope this helps.

Eric

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Admin1 YaBB Admin ★★★★★ Offline Posts: 1203	Reply #2 - Sep 30^th, 2023 at 11:39am If anyone is interested you could put all the ABCD figures into a spreadsheet. Then average the pairs AB and CD to get the centre of the feed aperture window. Then speculate as to the position of the phase centre at or inside the feed aperture window for each frequency and feed type!.
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