Login  Register

Re: Matching resonant antennas

Posted by donovanf on Jul 16, 2020; 10:32pm
URL: http://elecraft.85.s1.nabble.com/Matching-resonant-antennas-tp7663149p7663243.html

Ken's statement that " a non-resonant antenna can have a 1:1 SWR"
is patently false with the sole exception of a dummy load used as an
antenna.


73
Frank
W3LPL


----- Original Message -----

From: "Ken WA8JXM" <[hidden email]>
To: "Andy Durbin" <[hidden email]>
Cc: [hidden email]
Sent: Wednesday, July 15, 2020 7:30:58 PM
Subject: Re: [Elecraft] Matching resonant antennas

Yes, a resonant half wave dipole can have a feedpoint impedance of 5 ohms
to 90 ohms (SWR 10:1 to 1.8:1), but it's still resonant.

Conversely, a non-resonant antenna can have a 1:1 SWR.

Ken WA8JXM

On Wed, Jul 15, 2020 at 12:34 PM Andy Durbin <[hidden email]> wrote:

> "A correspondent asked me why I needed to tune a resonant antenna."
>
> Perhaps the question should have been "why may you need to match the
> impedance of a resonant antenna". The answer may be that not all resonant
> antennas are 50 ohm. Resonance only means that inductive and capacitive
> reactance are equal magnitude. Resonance says nothing about the value of R.
>
> Andy, k3wyc
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft 
> Help: http://mailman.qth.net/mmfaq.htm 
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net 
> Please help support this email list: http://www.qsl.net/donate.html 
> Message delivered to [hidden email]
>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft 
Help: http://mailman.qth.net/mmfaq.htm 
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net 
Please help support this email list: http://www.qsl.net/donate.html 
Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]