[TowerTalk] COUNTERPOISE for Dipoles

[Tom Rauch]

> > Consider a loop. It is really two bent 1/4 wl long dipoles, one is
> > center fed and the other is fed from the ends by the "bent" loading
> > sections. These loading sections have phase reversal at the 1/2 way
> > point, and oppose each other, so they contribute nothing to far- field
> > radiation.
> 
> Now I'm really confused.  I thought a full wave loop was 2 half wave
> sections stacked a quarter wave apart.  What am I missing here??  
> Tom W7WHY

I edited that wrong. The quad element is two 1/4 wl long dipoles 
spaced 1/4 wl apart. Take the "bent" out ahead of the 1/4wl 
dipoles, and it will be better. 

The 1/4 wl dipoles aren't bent, they are simply end-loaded by the  
sections beyond the "bend" that contribute nothing to far-field 
pattern.

So what you have is two stacked 1/4 wl long end-loaded dipoles. 
You have the gain of two end-loaded 1/4 wl dipoles stacked 1/4 wl 
apart. 
73, Tom W8JI
w8ji@contesting.com

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