Antenna/Line challenge #1
On 7/20/2015 9:28 AM, rickman wrote:
On 7/20/2015 9:46 AM, Roger Hayter wrote:
John S wrote:
On 7/20/2015 4:06 AM, Roger Hayter wrote:
John S wrote:
On 7/19/2015 9:16 AM, John S wrote:
On 7/10/2015 7:38 PM, John S wrote:
On 7/10/2015 9:30 AM, Roger Hayter wrote:
I may not have defined the generator adequately. I meant that the
generator will supply one watt regardless of the impedance it
sees.
That is your fallacy. A generator (not even a theoretical ideal
one)
will not supply one watt regardless of the impedance it sees.
In what way is it a fallacy? There are theoretically only two
possible
conditions where it is impossible. Do you know what those two
conditions
are?
I should not be asking that question. I should be supplying some
information. I apologize.
The two conditions are a zero ohm load and an open circuit (infinite
load). It is not theoretically possible to put power into either.
Those
two conditions require a source such that the results are,
mathematically, undefined.
But ALL other conditions are theoretically possible.
I don't think a true open circuit is actually possible, though one can
make a pretty good approximation.
Correct. And neither is a true short circuit. But, I was sticking to
theoretical conditions rather than getting into how much of a short or
open circuit really is.
Would a superconductor not be a true short circuit? Anyway, I thought
you were specifically talking about what was "possible" rather than
theoretical limits. Your all-purpose 1 W amplifier could have an output
voltage or current than approached infinity as the output load
approached open circuit and short circuit, if you are still talking
theoretically.
Even if a conductor has no dissipative resistance, won't all conductors
have radiation resistance? It is normally so small that it can be
ignored, but in the case of a true zero ohm conductor it would be more
significant.
Yes, except at zero frequency.
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