On 7/11/2015 4:52 PM, wrote:
rickman wrote:
On 7/11/2015 3:11 PM, wrote:

OK, but a defined load of 50 Ohms does not give a lot of room to
get the source impedance significantly lower.

For the curious:

https://en.wikipedia.org/wiki/Maximu...ansfer_theorem

And in particular, the section "Maximizing power transfer versus power
efficiency".

I never saw anyone in the other discussion prove that a generator,
conjugate matched to the antenna would reflect back to the antenna 100%
of the signal reflected from the antenna. The example given was a
purely resistive conjugate match oddly enough.

Perhaps the various issues in this example can be dealt with separately?
I would first like to clarify that if the load (or matching network)
impedance has a zero imaginary term it is a purely resistive load.

The above reference deals with complex loads and sources.

Certainly. Real numbers are a subset of complex numbers.

It does not address connecting them with a transmission line as that
is an entirely different subject.

Then let's not discuss it.

However, the two problems are fairly trivially solvable independantly.

The application of conjugate matching is mistaken and misused by most
people.

Suppose you have a laboratory power supply. It will deliver an
adjustable fixed voltage until its current limit is reached. What is the
output impedance of the supply in the region during voltage regulation?
What is the output impedance in current limit?

As I recall, you said that conjugate matching even works at DC.


By definition a purely resistive impedance is an impedance who's complex
part equals zero.

Yes. However, I would have put it this way "By definition a pure
resistance is an impedance who's complex part equals zero."