[TowerTalk] Open-wire transmission line

[Richard (Rick) Karlquist]

1.  If you make the wires unequal diameters, then instead of
having just Zo, you have two modes, even and odd, which have
different characteristic impedances.  This comes up all the
time when designing directional couplers.  Is that what you
are doing?

2.  If not, what are you doing where you need unequal
diameters?  I wouldn't really call that situation
"open wire line" any more.  For one thing, it will radiate
a lot of RF.

73
Rick N6RK

On 12/30/2023 6:32 AM, K1XX wrote:
> Folks, I'm looking for info on the impedance of open-wire that uses
> 
> different size wire.
> 
> Unless I missed it, everyone is giving info on the usual case of same size wire.
> 
> Thanks
> 
> 73 Charlie, k1xx
> 
> On December 30, 2023 8:47:41 AM EST, K1XX <k1xx at k1xx.com> wrote:
>> Morning folks and Happy New Year to all.  I am looking for equations, or an on-line calculator, for open-wire transmission line using different size wire.  So far, I've struck out.  Can anyone offer any help?
>>
>> Thanks
>>
>> 73 Charlie, k1xx
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