Jerry Martes wrote:

"Joe McElvenney" wrote in message
.. .


Hi,



other. In the book it says, ". . . when two stations use helical
antennas over a non reflective path, both must use antennas with the
same polarization sense.." I find this could be interpreted in
different ways and is not clear at all. It seems logical to me that if
both antennas had the same polarization that when they faced each other
they two helices would be in opposite directions and that would seem to
be bad. Am I right?


On your first point, imagine you've constructed a long, long
helix that starts at your location and travels all the way to the
other station. It is logical that a wave launched by you would
then travel unimpeded along it to the far location. Now cut the
helix in the middle and turn one end around. What you will then
see is two helices rotating in the same direction, that is both
ends will have the same direction of rotation.

Can't help you with the rest unfortunately.


Cheers - Joe



Hi Chris

I have some thoughts to share about how the CP antennas need to be
polarized, transmit and receive. But, I couldnt make any clearer than Joe
does.
Let me know if any additional text would be helpful.

Jerry




No it makes perfect sense, I don't know what I was thinking. I mean if
you take 2 right hand threaded bolts and have them face each other they
are still right hand threaded and a nut will go of one and right on to
the other spinning the same way. It's obvious now that I think about it.

--
Chris W

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