Thats interesting Mac I am going to look at that to see what he did.
I modelled a wierd 20 metre antenna today and it finished up with four lobes
in aq vertical direction at the front and the same number of vertical lobes
at the rear.
Need to find out what causes extra lobes. The extra lobes did drop the TOA
down
however to around 8 to 9 degrees
Regards
Art



"J. Mc Laughlin" wrote in message
...
While looking for something else, I came across two interesting antennas
in
the USPTO data base. Sixty years separates their filing dates.

Patent 2,268,640 shows an antenna invented by the famous George H. Brown.
It may be the first use of nested Yagi type antennas.

Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that
efficiency is preserved and a large F/B is effected. The inventor is
N7CL.

Http://www.uspto.gov/ is a place to start. Go to Patents and then to
Patent Searches.

Enjoy, Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
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