[TowerTalk] Antenna resonance question

Steve Hunt steve at karinya.net
Tue Dec 13 11:45:52 EST 2016


You need to define what you mean by "ring".

The antenna will see a conjugate match at 1.85MHz (not 2.24MHz) looking 
back towards the station end, but I don't know if that's what you mean 
by "ring"?

Steve G3TXQ



On 13/12/2016 08:05, Matt wrote:
> Hi folks - need some help.    A shortened 160m vertical ground plane antenna
> is cut and tested for a resonant frequency of 2.24 Mhz.   The antenna is
> matched near perfectly to 50 + 0j ohms at 1.85 Mhz using a shorted coax stub
> of appropriate length placed at the appropriate location along the feedline.
> With a 50 ohm dummy load attached to the station end of the feed line, will
> the antenna be resonant (ring) when externally excited at 1.85 Mhz or 2.24
> Mhz?
>
>   
>
> Thanks in advance for any insight you can offer.
>
>   
>
> Matt
>
> KM5VI
>
>   
>
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