well, yes, and no ! when still working for R.R., in the Sierras,
had such , on 2 GHz, dish's on a hillside to Colfax ,CA -- It worked-
sorta, was quite noisy, and had bad fade problems, even tho only
useing it to channel A-6 (highest freq was 32KHz for channel assignment)
and that was until coax link between the dishes leaked (water)!
A-6 is the lowest 6 channels in a multiplex system, and consider:
this was tied to a 300 channel (up to around 1.5 MHz) bandpass system!
(each channel = a voice channel, or up to 15 data channels (low speed))
To summerize, It can work, but most likely, not very effeciently.. Have
fun-- Jim NN7K

Hal Rosser wrote:
"Jim - NN7K" wrote in message
. com...

'Corse, consider that there are certain constraints-- one being that
the antenna must be within a small distance from one end of the loop.
(for passive reflectors, at microwave, believe, they state 2-3 miles
(MAX)). and two, consider that at VHF, there is an effect called
"KNIFE EDGE REFRACTION" that tends to bend a signal over a hilltop
to a distant target on the other side of that ridge of hills!
But, for cell phones in a vehicle, those thru the glass antennas
on cars, with a whip on the outside , and what looks like a PAWN
BROKERS 3 ball symbol on the inside, do exactly what you describe
(or at least are susposed to)! as info, Jim NN7K


Hi Jim,
Yes, I've heard of knife-edge refraction, but the instance I was referring
to in the article had a real positive benefit. As I recall, the operator
went from zero contact to satifactory contact by hooking up 2 beams
back-to-back at the summit, with one beam pointing back at him - and the
other beam pointed to the otherwise unreachable distant repeater.
I wouldn't have thought something like that would work without some
signal amplification. But it does.