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Old November 28th 08, 01:05 PM posted to rec.radio.amateur.antenna
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Default Quad and circular polarization

-.-. --.- wrote:
Greets OMs,

yesterday i had a QSO with K2US - impressive antenna, by the way i'm using
the station of a local OM near my QTH with a 4 elements 5 band Quad.

The beautiful thing is the 9-9+20 signal around 20.45 UTC, far away in
magnitude from the others stateside signals, around S5-7. So i remember my
father that tell me one day in his opinion the circular polarization in the
better choice... lose no matter about 6 dB, with any kind of polarization
used at the other side except circular - and faraday torsion due to
ionosphere - and in my mind comes 2 questions...

- we take some advantage from the fact that both are using quad antenna ??
- in my non-knowledge of the facts, i have in the past believed that the
quad antenna is near a circular-polarized antenna. Reading books and hearing
some QSO in the air i learn that quad can be horizontal or vertical
polarized, regard the feed point of the quad.. so - the circular
polarization need some kind of "special" feed point or is merely a "circle"
antenna ??

Apologize for the english and for the questions, maybe trivials and stupids,
but i believe one esxperienced OM can say far better than 100 books.

73,
CQ -.-. --.-



Circular polarization means you have equal H-Pol and V-Pol radiation,
with one polarization 90 degrees ahead (or behind) of the other.

A quad antenna is a folded dipole.
 
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