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I0OJJ > ANTENN 03.07.10 16:33l 29 Lines 1089 Bytes #-5794 (0) @ WW
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Subj: Re: language and antenna gain
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On Thu, 01 Jul 2010 14:27:56 -0700, Roy Lewallen <w7el@eznec.com>
wrote:
>Richard Fry wrote:
>> On Jul 1, 3:18 pm, Roy Lewallen <w...@eznec.com> wrote:
>>> Guess I just don't understand how a resonant, helically-wound antenna is
>>> "electrically short". Suppose you helically wound an eighth-wave
>>> vertical in such a way that it was resonant. Its physical length is an
>>> eighth wavelength. What would its "electrical length" be?
{SNIP}
>Depends. If the ground system is very good and you're willing to keep to
>a narrow bandwidth without retuning, you wouldn't be able to tell any
>practical difference between the two. For good experimental evidence see
>"The W2FMI Ground-Mounted Short Vertical" by Jerry Sevick, W2FMI in
>March 1973 QST.
>
>Roy Lewallen, W7EL
Somewhere back in time the word "aperature" was used to describe
antennas, especially stacked arrays. I think one of the prominate
authors that used the expression was Bill Orr.
Would that be relevant to this discussion? I have not heard the term
used in years.
John, W8CCW
Perpetual Student of many subjects.
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