On 3-Mar-2004, (Gordon Couger) wrote:

am working on the design of a sensor that needs to measure the
forward and reflected power in unison at or very near the feed point
of the antenna drive by a very short 4 inches of less feed line over a
range of 10 to 100 Mhz at power level less the 100 ma. The feed lines
will be potted in a plastic to water proof it so the sensors will be
embedded with them.

The ideal solution from a manufacturing and calibration point of view
would have the antenna come right out of the network of the amplifier
with no feed line to act as a transformer over a wide range of
frequencies.

This is not a class project as most of the regulars know I well beyond
that by nearly 40 years.

I can see a number of ways how to do it with a coaxial feed but open
wire is less expensive and easier to manufacture and make repeatable.
I realize at least the reflected power will have to amplified to be
measures by equipment in my price range.

Gordon,
Take a look at the Return Loss Analyzer at:

http//www.qsl.net/n2pk/

or

http://users.adelphia.net/~n2pk/VNA/VNAarch.html

Ken Fowler, KO6NO