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I0OJJ > ANTENN 01.07.10 16:26l 38 Lines 1273 Bytes #-5798 (0) @ WW
BID : 15364I0OJJ
Read: GUEST DL8BO
Subj: Re: language and antenna gain
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On Thu, 1 Jul 2010 15:16:10 +0200, "-.-. --.-" <a@a.com> wrote:
>
>"Richard Fry" <rfry@adams.net> ha scritto nel messaggio
>news:f8abc033-9c19-437f-a0fe-8309cb370897@c10g2000yqi.googlegroups.com...
>
>> 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.
>
>Yes, replying to Richard but also to Roy and Dave.. maybe i can't explain
>very well, but the sense of my latest question is this:
>
>if a half wave end-fed *monopole* antenna have the following primary
>characteristics (if IIRC):
>
>- High Z at the feedpoint (voltage maximum and current node);
>- very small counterpoise lenght compared to the resonant wavelenght of the
>antenna (typical 0.1-0.2 lambda)
>
>can i mantain the same characteristics shortening the antenna in any way ??
>
>Thanks for read and explain to those who want clarify my doubts.
>
> -.-. --.-
>
Google EZNEC and find Roy's site.
Download & install the demo version- it is free!
Go through some of the simple examples like dipoles, 1/4 verticals
etc.
Bring your questions back to this group and we will all benefit.
Antennas are pleasantly addictive!
I consider myself a perpetual student...
John Ferrell W8CCW
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