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#1
August 13th 07, 01:47 PM
posted to rec.radio.amateur.antenna
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Patch antenna Polarization?
"amdx" wrote in
: "nx7u" wrote in message oups.com... On Aug 12, 12:25 pm, "mike" wrote: What is altered to change polarization (V/H) on a square patch antenna? I see the corners are cut to make it circular polarization. But how do you force horizontal or vertical on a square patch? Mike E-plane is along the "length" dimension...the E-vector points from the side with the feed to the opposite side. Altering the polarization is simple physical rotation, or feeding from an adjacent side. Ok, to make sure I understand; If I put the feed on the lowerhalf of the patch the antenna would be vertically polarized? And, if I put the feed on the left or right half of the patch the antenna would be horizontally polarized? Now to complicate things, I see some patches split the difference and put the feedpoint on the left side of the lowerhalf. What does that do? Thanks, Mike Most probably to achieve circular radiation (e.g. GPS) Sam |
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