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PostPosted: Sat Dec 01, 2007 9:17 pm 
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Radio waves can be polarized, just like light. In fact, you would use a real metal picket fence to polarize radio waves! And, as you pointed out, after passing through the vertical posts, the radio waves would be horizontally polarized. :)


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PostPosted: Sun Dec 02, 2007 7:43 am 
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Hi,

Aslong as you make the spacing between the metal bars of the polarizer smaller than the wavelength, you can polarize any electromagnetic wave as Brian said.
You can make your own, small, copper model of a prison-bar-window and use that grid as an on-off switch for a polarized wave.

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PostPosted: Sun Dec 02, 2007 10:37 am 
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Hi,

I've created some images to illustrate the wire grid polarizers a bit better, hopefully that is helpfull.

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