[time-nuts] Re-radiating a GPS signal...??

Michael Baker mpb45 at clanbaker.org
Thu Apr 12 13:05:39 UTC 2012


Time-nutters--

So--  How do GPS signal re-radiators work?

How do you place a GPS antenna on top of a building,
pick up the signal with an LNA, amplify it to re-transmit
on an inside antenna without the amplified re-transmitted
signal getting back into the roof-top receiving antenna?

I can see circumstances where a huge metal building
(aircraft hangar?) might provide enough isolation to
prevent problems, but in many cases I wonder about it...
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As an aside note-- I recall seeing, many years ago, a totally
passive TV signal repeater on top of a tall hill in mountainous
territory relaying a TV station signal to some homes in a valley
just below.  The passive repeater consisted of an array of
high-gain UHF yagis pointing to the 40 mile distant TV station tower.
The yagi array was coupled to another set of high-gain yagi
antennas pointing down to the homesites in the valley.  I was
told that it worked pretty well.

Mike Baker
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