At 04:56 AM 2/4/01 -0500, Tom Rauch wrote:
>My three element 40 meter antenna has a F/R of over 50 dB.
>
>It has one reflector, one driven element, and one director.
>
>It is limited in null depth, in direct actual measurements, by the
>ability to physically hold the elements steady and by scattering
>from the surroundings rather than the any lack of additional
>elements.
>
>It is actually quite easy to get values that high in 3 element
>antennas, since they can be made to have nearly perfect current
>ratios in the elements (1,2,1 ratio).
What are the gain bandwidth and SWR bandwidth characteristics that go with
that very high F/B? I bet there's no free lunch.
73, Pete N4ZR
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