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Old December 4th 09, 03:31 AM posted to rec.radio.amateur.antenna
tom tom is offline
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First recorded activity by RadioBanter: May 2009
Posts: 660
Default Faraday shields and radiation and misinterpretations

Art Unwin wrote:
I have gathered that you have had some experience in installing
consumer dishes and I recall you stating that dishes can only be used
in the giga hertz range, without mention that it is the size of the
antenna determines whether a dish orreflecter is pertinant or not.
Very strange!


Dishes are usable based upon their size relative to the frequency of
use. You seem not to understand that.

They work by reflecting the EM waves directed at them. The gain is set
by the area of the dish in square wavelengths, and your pretend physics
can't change that.

A DSS dish isn't even a pinpoint to reflect off of at 160m, which is
your favorite example.

A dish that provides only 3dB gain at 160m would be approximately a
kilometer in diameter. How big is your mom's garden?

tom
K0TAR