Thread: Dish reflector
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Old April 21st 09, 11:04 PM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
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Jim Kelley wrote:

I have the same recollection as Tom.


If you do, it was from many years ago when I was young
and foolish. :-) For the past 5 years, at least, I have
been telling everyone that both sides of the argument
are wrong as rail-arguments usually are. The facts lie
somewhere in between the two rails.

Or, maybe
3. A less than quarter wave antenna is less than 90 degrees long.


Obviously true for the physical length. Just as obviously
impossible for the electrical length. If you understand
that the feedpoint is purely resistive and
Zfp = (Vfor-Vref)/(Ifor+Iref) then you will understand
that the antenna *must* be electrically an interger
multiple of 90 degrees long.

If you need help with that concept, let me know. If you
are embarrassed to discuss it in public, send me an email.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com