Topband: EZNEC 5.0 +
w8ji at w8ji.com
Fri Dec 5 16:39:48 EST 2014
Return loss is just another misleading confusing way to express SWR.
Return loss, like percentage reflected power, does not indicate any type of
loss. It just expresses SWR in a different form.
We can have 10:1 SWR, which would be a 1.743 dB return or "mismatch" loss
or 67% reflected power, and still have virtually no loss. We can have 67%
reflected power and still have nearly 100% of transmitter power getting into
the antenna and being radiated.
The best advice is to ignore it all, and just use SWR for now. :)
----- Original Message -----
From: "Charles Yahrling" <cfytech24x7 at gmail.com>
To: <topband at contesting.com>
Sent: Friday, December 05, 2014 3:29 PM
Subject: Topband: EZNEC 5.0 +
> Just getting started modelling and looking for answers to questions not
> found in manual so far. For example, what exactly is included in the
> Return Loss figure shown in the SWR window? Just ground reflection loss,
> total system loss, something else? Trying to understand why Return Loss
> greater for lower SWR curve values. e.g see this when toggling between std
> and alt impedance. What is this suggesting, go with lower return loss or
> lower swr curve?
> An incomplete grasp of the fundamentals is admittedly likely here <g>.
> 73, chuck
> de AB1VL
> NAQCC #6799
> Topband Reflector Archives - http://www.contesting.com/_topband
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