RadioBanter - View Single Post - Rho = (Zload-Zo*)/(Zload+Zo), for complex Zo

September 11th 03, 03:28 AM

wrote in message ...

The tricky part is measuring this correctly, because you
would need an SWR meter that is calibrated for the same Z as
Zo.

It is not nearly that tricky. 'Revised' rho, as you state,
predicts 0 Volts across the capacitor. This will be easy to
measure with any AC voltmeter that can handle your test frequency.

Perhaps, but i'm interested in the forward and reflected
waves, which you can only get with directional couplers on a line of
the same Z as the Zo, i suspect. So even if you get 0 volts, there
are still fwd and rev waves.

I predict, using circuit theory, that if you excite the
test circuit with a 1 Volt sinusoid at a frequency that
makes the impedances j200 and -j200, that you will measure
4 Volts across the capacitor, not 0. This aligns with the
result expected from 'classic' rho.

...Keith

PS Please consider dispensing with the insults. They do not
further the discussion and are quite unbecoming.

Go ahead and bench test it, and let us know what you find.

Slick