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Thanks for the info. I got to mess with W-band stuff years ago, but I'm mostly Ku and below now. Would love to tear down some 80 GHz hardware.

Have you seen anything come of the "angular momentum" polarization discovered a few years ago? Seemed specific for P2P microwave.

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I would love to hear more about that - have any links? From a quick google, all I can dig up makes it sound like it's normal circular polarization, which is used quite often in satellite. Not sure why it wouldn't make it into terrestrial, since it has some interesting advantages (no x-pol alignment issues!)

Google "angular momentum antenna". IEEE had a write up a few years ago, but details still lacking. It was simple as twisting the dish surface into a helix, but they didn't say how many modes could be generated.

I've yet to see a product of any sort I can buy with a credit card or purchase order. Would also like to know if anything comes of it.

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