Richard Clark wrote:
"As I said, all achievable through references that many have available
to them---."

Richard Clark`s question was:
"A 50-Ohm line is terminated with a load of 200+ j0 Ohms. The normal
attenuation of the line is 2.00 decibels. What is the loss of the line?"

The ARRL Antenna Book is a reference designed for radio amateurs and
available to many..

(Eq 13) on page 24-9 gives: SWR = R/Zo, or 4 in Richard Clark`s
question.

(Fig 13) on page 24-10 gives a reflected power of 36 W from a 4:1
mismatch when 100 W is applied.

(Fig 14) on page 24-11 gives an additional 1.2 dB loss when an SWR of 4
applies to a cable with a matched loss of 2 dB. Total is 3.2 dB loss.

The 19th edition of the "ARRL Antenna Book" eliminates most of the
arithmetic needed to calculate loss added by SWR. Just use the
convenient figures on pages 24-10 and 24-11.

Next to Terman`s "Radio Engineering", I think the ARRL`s "Antenna Book"
is the best reference you can have on your shelf.

Best regards, Richard Harrison, KB5WZI

George, W5YR wrote:
I urge anyone seriously interested in understanding transmission line theory
to include Chipman on their bookshelf.

It's out of print, George. How much will you take for yours? :-)
--
73, Cecil http://www.qsl.net/w5dxp



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"George, W5YR" wrote in message
...
If anyone is interested in really getting to the bottom of this endless
jousting, turn to page 136 of "Theory and Problems of Transmission Lines"
by
Robert A. Chipman. This is a Schaum's Outline book - mine is dated 1968.

George,

I took a course from Dr Chipman. The text he used was Adler, Chu, and Fano.
I bet he references that book.

Tam/WB2TT

On Thu, 28 Aug 2003 09:02:40 -0400, "Tarmo Tammaru"
wrote:


"George, W5YR" wrote in message
...
If anyone is interested in really getting to the bottom of this endless
jousting, turn to page 136 of "Theory and Problems of Transmission Lines"
by
Robert A. Chipman. This is a Schaum's Outline book - mine is dated 1968.

George,

I took a course from Dr Chipman. The text he used was Adler, Chu, and Fano.
I bet he references that book.

Tam/WB2TT


Hi Tam,

It is the second reference and it is found on page 8. No doubt those
authors also understand that source characteristic Z must be equal to
transmission line Z to characterize SWR on the line. Of course, at
this point I cannot vouchsafe for that specifically, however, it seems
unlikely anyone here will negate the premise.
Except to say "t'ain't so." ;-)

I said "at this point" as this could be resolved (or from the other 11
references) by my visiting my engineering library at the U. This will
not prohibit others from denial however which simply mocks Chapman's
work and those he references.

I won't put the challenge I have offered others to you. You probably
would have answered it by now if you could have.

73's
Richard Clark, KB7QHC

"George, W5YR" wrote in message ...


Finally, he clearly shows how terminating an actual physical line
appropriately can result in a reflection coefficient as large as 2.41.

This revelation DOES NOT imply that the reflected wave would bear more power
than the incident wave. For a line to display this behavior, it must first
of all have a high attenuation per wavelength. Due to this high attenuation,
the power in the reflected wave is high for only a short distance from the
termination.


George, with all due respect, even if the SWR measurement was
done right at a short or open, the highest rho you could get would be
1.

If the power reflection coefficient is the square of the
MAGNITUDE of the voltage reflection coefficient, how can you have a
voltage RC greater than one without the power RC being also greater
than one??


Slick