[mythtv-users] Antenna amplifier
David Brodbeck
gull at gull.us
Tue Aug 5 17:15:00 UTC 2008
Allen Edwards wrote:
> It may also help to have the two antennas close together, I don't know.
> This point is, if the signals are in phase, they will add and not
> notch up the passband. You can actually take two identical antennas
> pointed in the same direction, space them apart on the pole, and combine
> them for added gain but that is a well controlled situation.
The trick, of course, is that if they're in phase on one channel they
won't be on another. This is where you get the weird notch effects --
if they happen to be close to 180 degrees out of phase on one particular
channel, they'll neatly cancel out each others' signals.
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