[TowerTalk] Quad antenna matching which is best gamma match or using coax matching sections for bands that need it.

Joe Giacobello, K2XX k2xx at swva.net
Wed Jan 16 14:28:27 EST 2008


I agree with Norm and others that the quarter wave 72 ohm matching 
sections are simple and effective for matching a typical two element 
quad.  Although most of my experiences are with four element quads, it 
is likely that your six element quad has a feed impedance in the 
vicinity of 50 ohms to start with.  My observation has been that when 
going to four elements, the impedance generally drops to around 50 ohms.

It would be worthwhile to model your quad in order to see just what the 
impedance is.  You might be able to make some adjustments to element 
lengths, if necessary, to push it toward 50 ohms without sacrificing 
performance.

73, Joe
K2XX

 KZ4USA wrote:

>Trying to decide which way is the best way to go with my large 6el Quad design.
>
>
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>Jack
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