Re:Why not waveguide? ...because you're an idiot! (Score 1)

please...

It all depends how much of an offset (if any) is between the send and recieve channels. It also depends on the bandwidth of the channels. When you're talking microwave, the bandwidth is (relatively) small. Therefore, you can have both signals passing through the waveguide at the same time without interference. Radio waves don't "run into" eachother.

The other possible scenario is that both channels are multiplexed travelling on one carrier (how do you think a phone line works full duplex on 2 wires?) I can't confirm this as I don't know the specifics on this card, but it is done quite often.

You should consider doing some research next time...