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Old November 3rd 03, 09:08 PM
Cecil Moore
 
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Roy Lewallen wrote:

No, that's not what I asked. Let me try again.

I have an antenna whose feedpoint impedance I measure as R + jX. I put a
lumped (physically very small and short) coil in series with it and
drive it with a generator. You and Yuri say that the current going into
the coil is different from the current going out.


Yes, just as the current going into a 1/4WL stub is different from the
current going out. If you use an inductive stub, is the current the
same going in as going out? If so, you have invented faster than
light transfer of current.

Now, I replace the antenna with a series resistor and capacitor or
inductor which also has a terminal impedance of R + jX ohms. My question
is, does the inductor now have equal currents at its two terminals, and
why or why not?


You have replaced a distributed network with a lumped circuit. If the
lumped circuit model worked on distributed networks, you would be right
and there would be no need for a distributed network model (but there is).
--
73, Cecil http://www.qsl.net/w5dxp



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