X-10 Antenna Interference...

["Michael G." <514mike@xxxxxxxxx>]

Hi again!

I have a question that isn't really so much about Home Automation as it
is about radio waves and antennae:

Right now, I have two transceivers plugged into the same socket.  I
actually extended each antennae so that they look like bunny ears.

>From a physics point of view, do multiple antennae interfere with one
another?  Does an antenna "absorb" the signal, thus weakening it for
the other device?

I do not know much about this stuff, but intuitively, I would say they
would not interfere with each other.

If I had ten FM radios on a table, would the signal get progressively
worse for each radio as each antenna was extended??

Or taken a step further... if everyone in a city tuned into the same
radio station, would that affect the station's signal?

I have so far experienced no problems (I think).

I have two transceivers piggybacked in one outlet, and in another
outlet, I have a third transceiver.  My remotes and sensors seem to
work 98% of the time.

I would love to take all three transceivers, and plug them in a power
bar, side-by-side.  I can then add a fourth as well, and hide it.

Do you think that is a good thing, or a bad thing?

I'm sorry if this is a basic radio/physics question, but I don't think
the answer is so obvious...!

Thanks!

Mike