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Re: Topband: EZNEC 5.0 +

To: "Charles Yahrling" <>, <>
Subject: Re: Topband: EZNEC 5.0 +
From: "Tom W8JI" <>
Reply-to: Tom W8JI <>
Date: Fri, 5 Dec 2014 16:39:48 -0500
List-post: <">>
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" <>
To: <>
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 is
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
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