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Conjugate Match and Mismatch Attenuation
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May 16th 09, 05:07 AM posted to rec.radio.amateur.antenna
Owen Duffy
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First recorded activity by RadioBanter: Dec 2006
Posts: 1,169
Conjugate Match and Mismatch Attenuation
dykesc wrote in news:ad161de6-d48c-4ad5-80a0-
:
... Sounds like
even with a conjugate match at the transmitter, I need to calculate
total line losses based on SWR readings without the transmatch in the
line.
Well, that is an approximation based on a number of assumptions. If you
don't know the assumptions, or cannot be sure that they apply, it is better
to calculate the line loss based on the load impedance (or inference from
the input impedance).
See TLLC at
http://www.vk1od.net/calc/tl/tllc.php
, or TWLLC at
http://www.vk1od.net/calc/tl/tllc.php
.
My article "Additional loss due to VSWR" at
http://vk1od.net/blog/?p=316
canvasses the issue.
Owen
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