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Subject: Re: detector design
From: Tom Leiper twleiper@........
Date: Sat, 8 Sep 2001 11:50:53 -0400

On Sat, 08 Sep 2001 12:50:43 -0230 Ron Thompson
> My twist on this is to have the radiating plates on the
> outside, the two plates 180 degrees out of phase with
> each other, and have the receiving antenna on the arm
> in the null field position so that at rest no signal is received.

The problem with that approach is the wavelength of the
RF signal you are nulling is probably thousands (or millions)
of times the excursion of your detector, so you would have to
get well up into the SHF range to have short enough wavelengths
to permit some kind of rational experimentation with tuned
elements and phase detection. The other detectors to which
you refer take advantage of the inverse square law and are largely
frequency independent. You could do it with light just the same,
except the RF doesn't need to be kept in the dark.

But hey, keep twisting away at'll get it broke yet :-)


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Larry Cochrane <cochrane@..............>