Quote:
Originally Posted by timgr
By combining the signal from multiple antennas in the analog RF domain, you are creating an antenna array. I believe there is plenty of voodoo that goes into making antenna arrays. I know a little about RF arrays (from MRI), and I understand a tiny bit about phased arrays. But designing an antenna array for a specific purpose requires a lot of knowledge ... I could probably do it after a couple of years of study, but I'm not going back to school.
However, combining antennas using two tuners just requires that the antennas be far enough apart on the roof that they are not electrically coupled by their proximity. Then each tuner decodes only the signal from a single antenna, and there is no mixing in the analog domain. The choice of which program you want is done in the digital domain (on the HTPC).
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My neighbor has two or three separate antennas, all fed into separate tuner cards (or maybe they're SiliconDust HDHomeRun units) in his HTPC system, and all available on a single on-screen menu. One of these days I'll play around with making my own from the several computers I've got laying around, but in the mean time, I'm interested to hear what others have done, especially to combine multiple tuners.