I found this information on Christman phasing which may be of interest:
https://lonneys-notebook.blogspot.com/2020/10/phased-arrays-christman-feed-s
ystem.html?m=1
GL
John KK9A
David kb8nnu wrote:
Jim,
I finally had a few minutes to go back and measure the antennas at the feed
point. I found 1 antenna slightly off so I adjusted it so both are now
relatively close. Antenna A was R=32 X=9 and Antenna B was R=38 X=7
centered at 7.100. I had several people recommend adding a choke at the
feed point on each antenna. I may have to add some beads. Thoughts? I also
like the idea of implementing a simple LC network something like Gary NA6O
suggested. Now, I am second guessing myself and maybe should have gone a
different route.
DaveKB8NNU
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