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Author Topic: And another Antenna!  (Read 392 times)
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WA4WAX
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« on: April 02, 2024, 08:17:54 PM »

https://f6aoj.ao-journal.com/cariboost_files/rotate_20the_20bobtail_20curtain.pdf
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WA4WAX
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« Reply #1 on: April 05, 2024, 07:28:35 AM »

I am going to add an idea.

Terminate the end of that ladder line segment with a variable capacitor. Voila!  You have a hybrid stub.  By adjusting the variable, you can continuously walk a short up the line.  Walk it up to a place at or near the 90 degree spot (About half way), and you can have a unidirectional end fire pattern. EZNEC or some other program would help you determine the best place for the short.

1/10 inch spacing would probably be plenty for the cap.

Have fun.
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