Re: NEC-LIST: losses simulation

Yes, that's correct. But be aware that if you space the turns very
closely (less than a few wire diameters), the real antenna wires will
exhibit a higher resistance due to proximity effect that's not accounted
for by EZNEC/NEC.

Roy Lewallen

ROSSI Giuseppe wrote:
> Dear all,
> I wish to submit a question concerning the NEC capability of simulating
> losses.
>
> I wish to build a small (compared to the wavelength)dipole
> for a the radioamateur band of 1.8 MHz.
> To such a purpose i wish to use helix in the normal mode: a dipole with the
> two arms
> made of wounded wire.
> The idea comes form the book "small antenna".
>
> In order to have some idea about the functionality of this kind of antenna I
> start
> playing around with elix in NEC.
>
> The question is the following: to evaluate the losses of an antenna I start
> doing the simulation (with EZNEC), first with the antenna made of copper
> wire, than with the antenna made with Zero losses option.
>
> In both the cases i measure the real part of the input impedance.
>
> Is it consistent to say that the input resistance of the case with zero
> losses option
> is the pure radiation resistance of the antennna?
> Hence subtracting this value from the input resistance with copper wire, I
> get the antenna
> resistance losses.
>
>
> Thanks to all
>
>
> IZ1BLH

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