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Old March 30th 09, 08:39 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
Posts: 3,521
Default vertical antenna loading coil vs toroid

Cecil Moore wrote:
Seems to me the large air-core
coil occupies a greater number of degrees of antenna
than does the toroidal inductor.


I've received a number of emails requesting that I
explain what I meant by this statement. It is easiest
understood by people who can solve the following
problem.

How can the impedance looking into the following
physical 45 degree, dual-Z0 stub be purely resistive,
i.e. electrically 90 degrees and resonant?

---22.5 deg 300 ohm twinlead---+---22.5 deg 50 ohm coax---open
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com