I *was* referring to the transmission line feature in EZNEC, not a
literal modeling of the transmission line wires. [Thank you Ulrich,
long time no hear]
For modeling linear loading, or placing wire to deal with induced
longitudinal currents along balanced transmission lines, NEC caveats
apply.
>From the postings I see around, some number of EZNEC owners are using
the NEC-4 engine, apparently plunking money on the table to run that
version.
73, Guy.
----- Original Message -----
From: "K4SB" <k4sb@bellsouth.net>
To: <antennaware@contesting.com>
Sent: Monday, March 14, 2005 12:26 AM
Subject: Re: [Antennaware] Modelling transmission lines.
> "Guy Olinger, K2AV" wrote:
>> Many antenna programs have a method for placing a simple
>> transmission
>> line in the model.
>>
>> EZNEC, for instance will allow you to define a very short wire
>> (like
>> one inch) place it just about anywhere at a distance from the
>> antenna
>> wire parts, and define a transmission line (including substituting
>> a
>> specified length for the actual distance). You then place a source
>> on
>> the short wire and you can run impedances on it. Great for coming
>> up
>> with tuned feeder multiband solutions.
> --------------
>
> Have to agreeably disagree with Guy on this one. EZNEC does NOT like
> closely spaced lines according to the documentation, and
> segmentation
> on a 1" line at 160 meters would just not be reliable.
>
> One of the big problems with the NEC-2 engine, and I wish I had the
> answer.
>
> 73
> Ed
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