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Old June 21st 04, 03:03 PM
Yuri Blanarovich
 
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Likewise,
a purely circularly polarized field can be split into non-zero vertical
and horizontal linear components.

Roy Lewallen, W7EL


Sooo,
we can say that "slanted" 45 deg (circular) polarization as produced with full
wave square shaped quad loop fed in a corner has vertical and horizontal
components that are (typically) 3 dB down from the maximum in 45 deg plane?
According to modeling software, which shows vertical and horizontal components
of slanted polarization, the radiation pattern is a composite of both, with
antenna responding to either V or H polarized waves (with 3 dB down from
slanted) and according to pattern "belonging" to each (V or H) polarization. Is
anything wrong with this statement?
Can we then say that "slanted" polarization antenna has practically "dual" (V
and H) polarization properties with 3 dB down from slanted orientation?
Advantage being fuller radiation pattern (minimized nulls) and polarization
"diversity" at a cost of 3 dB from the "ideal" slanted orientation.
One "Guru" on his web page claims that there is no such thing as dual
polarization.
The "problem" seems to be in semantics. I see nothing wrong calling it "dual"
polarization, because it produces combination patterns "belonging" to either V
or H polarized antennas, (with 3 dB down from ideal slanted) and fuller pattern
than either of V or H alone.
It ain't so, am I wrong?

Yuri Blanarovich
www.K3BU.us
www.computeradio.us - home of "Dream Radio One"


 
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