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Old April 10th 06, 05:25 PM posted to rec.radio.amateur.antenna
Bill Ogden
 
Posts: n/a
Default Current across the antenna loading coil - from scratch

Speaking as a lurker, I find Roy's and Tom's postings very educational and I
appreciate the time they take to do it.

I am a little dense, but I think I have learned four key points (at least,
key for me) from this material:

1. One can discuss transmission lines and antennas using pulse analysis or
steady-state analysis. When these two are mixed together the results can be
a mess.

2. When discussing "phase difference" we need to specify the two components
that have the difference. (I.e., phase difference between the current into
and out of an inductor is a different animal than the phase difference
between current and voltage at a specific point.)

3. Superposition ("adding together") of power computations is not valid in
reactive circuits.

4. Displacement current is as real as any other current when dealing with
antennas and their components. (I cannot remember "displacement current"
ever being mentioned back in the dark ages when I was in EE school. Perhaps
the school should remain nameless.)

Bill - W2WO