Roy Lewallen wrote:
If you put the perfect voltage source and the source resistor into a box
and label it "Source", you have a Source whose impedance perfectly
matches the transmission line. It's a Z0-matched system.

Sorry, Roy, a 50 ohm source driving a 200 ohm load is NOT a
Z0-matched system by any stretch of the imagination. From the
ARRL Antenna Book: "The Z0 mismatch (at the load) creates a
reflection having a magnitude of rho = (ZL-Z0)/(ZL+Z0)
causing a reflection loss rho^2 that is referred back along
the line to the generator. This in tern causes the generator to
see the same magnitude of Z0 mismatch at the line input."

This exactly describes your example which has a 50 ohm Z0
mismatch (and a 200 ohm Z0 match). The mismatch is easy to
see in the following:

50 ohm source--1WL 200 ohm line--+--1/2WL 50 ohm line--200 ohm load

Point '+' is a Z0-match to 200 ohms. A Z0-match to 50 ohms
doesn't exist anywhere.

The source impedance of my circuit is as simple as it can get. If you
can't explain how it works, it reveals a deficiency of your theory;

You assume I don't know how it works because you don't even know
what a Z0-match is???????? How very typical of you.
--
73, Cecil http://www.qsl.net/w5dxp


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