"David Robbins" wrote in message
...

i think the more important thing now is to point out to the arrl the error
of using that form of the reflection coefficient in place of the
'conventional' one in the latest antenna book so it doesn't become gospel
in
the future.


I have contacted n6bv and he reports they have already changed the 20th
edition of the Antenna Book back to the 'conventional' rho and changed the
power analysis to use the full hyperbolic formlations for voltage or current
to calculate the line loss.

"David Robbins" wrote in message ...
"David Robbins" wrote in message
...

i think the more important thing now is to point out to the arrl the error
of using that form of the reflection coefficient in place of the
'conventional' one in the latest antenna book so it doesn't become gospel
in
the future.


Conventional RC formula is fine, just assume Zo is purely real,
which is what you almost always do anyways.


Slick

"Dr. Slick" wrote:

"David Robbins" wrote in message ...
"David Robbins" wrote in message
...

i think the more important thing now is to point out to the arrl the error
of using that form of the reflection coefficient in place of the
'conventional' one in the latest antenna book so it doesn't become gospel
in
the future.


Conventional RC formula is fine, just assume Zo is purely real,
which is what you almost always do anyways.

In another branch of this thread it has been demonstrated that the
conventional RC formula correctly predicts the reflected voltage
for lines with non-real Z0. Convential RC is the general predictor
for transmission lines.

The caveat is that for lines with non-real Z0, |rho|^2 can not be
used to predict reflected power. |rho|^2 predicts power only for
the special case of lines with real Z0.

....Keith

In another branch of this thread it has been demonstrated that the
conventional RC formula correctly predicts the reflected voltage
for lines with non-real Z0. Convential RC is the general predictor
for transmission lines.


I disagree with the demonstration. Maybe you are a bit biased?



Use conventional RC formula for purely real Zo only, which is what we
mostly do anyways.



The caveat is that for lines with non-real Z0, |rho|^2 can not be
used to predict reflected power. |rho|^2 predicts power only for
the special case of lines with real Z0.


This may be true, but are you saying that a capacitor can reflect an
RMS voltage wave that is greater than the one that charges it?


Slick