"MRW" wrote in news:1172850043.053869.294430@
30g2000cwc.googlegroups.com:

Good morning!

I would like to request some additional info regarding the following
matter.

Is there a way to approximate the antenna factor loss (in dB/m) for an
x-length (in inches ... maybe 26 inches) regular telescoping, monopole
antenna that will be subjected to frequencies between 88-108MHz (FM
band) at a height between 2ft to 15ft from the ground?
....
I was told that there may be a way to estimate the antenna impedance
assuming certain conditions. I was hoping to find some reference for
this subject, and just assume how much of the signal is lost due to
the antenna impedance and 50-ohm receiver impedance mismatch. I have
seen some nomograph for VSWR, so I figured if I can find the estimated
antenna impedance at the given conditions, then I can calculate
reflection coefficient and relate that to VSWR and then to the
nomograph to get my antenna factor value.
....

Here is an example of the workup of Antenna Factor for a small square
untuned loop for field strength measurement:
http://www.vk1od.net/SmallUntunedSquareLoop/index.htm .

Is this really what you wanted to do, but for a short monopole (which of
course needs a different approach)?

Owen