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I0OJJ > ANTENN 01.07.10 19:34l 22 Lines 858 Bytes #-5797 (0) @ WW
BID : 60234I0OJJ
Read: GUEST
Subj: Re: language and antenna gain
Path: DB0FHN<DB0NOE<DB0GAP<DB0GPP<DB0SEL<DB0RBS<DB0SWR<DK0WUE<IK6ZDE<I4UKI<
I0OJJ
Sent: 100701/1708z @:I0OJJ.ILAZ.ITA.EU #:6130 $:60234i0ojj
Richard Fry wrote:
> A helically-wound dipole or monopole that is physically short in terms
> of a free-space wavelength can be made electrically resonant at its
> input terminals as a result of the inductance of the helical form of
> the radiating conductor.
>
> But that does not mean that it has all of the electrical
> characteristics of a linear conductor that is inherently resonant,
> without the need for inductive loading.
>
> The radiation resistance of such a helically-wound radiator can be
> much lower than a naturally resonant radiator, which can mean that the
> percentage of transmitter power radiated by the antenna SYSTEM can be
> much lower than when a naturally resonant radiator is used.
> . . .
But a helically-wound radiator *is* a naturally resonant radiator if
wound to make it so. It just isn't straight.
Roy Lewallen, W7EL
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