Re: NEC-LIST: Near Field Values with 4nec2

> Hi to all,
> I use 4nec2 and when i plot the results given from a Near Field
> Electric Value Computation I note that the values plotted are very
> bigger than the expectation.
> If I take the value from the *.out file and I calculate the magnitude
> this value agree with the theory, so I think that it's a problem of
> the tool 4nec2. I note that the envelope of the values plotted from
> the 4nec2 is similar the one who I have obtained by myself. I suppose
> that the values are multiplied for a incomprehensible factor.
> Someone else have find this problem?
> I make some mistake (probably)?
> Thanks to all in advance?
> Mirko Dionisi
>
> Ing. Mirko Dionisi
> Analisi di Base e Simulazioni
> I.S.L. - Ingegneria dei Sistemi Logistici
> ALTRAN Group
> Via del Marmiceto 6/C,
> 56121 Ospedaletto (PISA)
> Phone: +39 050 9845-01
> Direct: +39 050 9845-16
> Fax: +39 050 988372
> Mail: mirko.dionisi_at_isl-altran.it
> Web:
> www.isl-altran.it
>
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Mirko,

I am not sure what you mean by "taking something out file to
calculate a magnitude that agrees with theory"???

As far as I am concerned NEC-4D calculates near fields that agree
with measurement. In a paper I presented at the AP-S Symposium, June
2004, Monterey, CA, I reported on validation of NEC based on
extensive accurate MF antenna experiments, including near fields ---
we measured E and H fields beneath the elevated radials of a monopole
antenna --- radial height 3m, measurement height 1.5m. The NEC
values are NOT multiplied by an "incomprehensible factor"!!!

J.S. Belrose and S. White, "On Validation of NEC-MoM: A useful tool
for MF Antenna Design", AP-S Symposium, Secial Session
  on 30 Years of NEC, Monterey, CA, June 2004.

John S. Belrose

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