[TowerTalk] Very very very large loop antenna

Dan Zimmerman N3OX n3ox at n3ox.net
Thu Feb 17 15:57:59 PST 2011


>
> Thinking about a loop of 26400 feet.



!!!!!!!!!!

The pattern is remarkably weird.  I tried a square loop at 50 feet above
"average" ground on 160m and 80m, fed in the middle of one side.

http://n3ox.net/files/hugeloop.jpg

It's basically a rhombic with a bad pattern.  Much of the current is
traveling wave current, but there's enough standing wave current and array
action between the two sides adjacent to the fed side to make big ripples in
the pattern.

The current in three of the four sides is almost purely traveling wave, like
in a rhombic or Beverage.


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