"Jef" wrote in message
...
For a loop antenna with a secondary, there is voltage across the
antenna
winding and current through it. Which is the secondary responding to?


Since you can't have a current thorough the antenna without a voltage
the answer is both, It is a chicken and an egg situation tied together
by Ohm's Law.

That said, low impedances look like constant voltage sources or shorts,
and carry a lot of current, while high impedances look like constant
current sources or opens, and develop a lot of voltage. It's plenty of an
approximation, but when you call an SWR 1.2 a good match, it doesn't
take much in either direction to produce that.

This is relative to system impedance (50 ohms, say), or if not in a system
with characteristic impedances, then some factor of Zo (377 ohms). At
"lumped constant" frequencies, Zo and SWR and stuff aren't all that
relevant anymore, but the concepts always apply.

Tim

--
Deep Friar: a very philosophical monk.
Website: http://seventransistorlabs.com