Re: NEC-LIST: How to find the voltage or current from an incident wave.

Hi Peter,

The concept you need (I think) is Cymomotive Force (CMF). The CMF is
the voltage determined by multiplying the far field voltage by the
distance. i.e. CMF = E d for an isotrope E = SQRT(30 * P) / d, so
CMF = SQRT(30 * P), where P is power. CMF turns directly to effective
isotropically radiated power.

73,

"Richeson, Peter D" wrote:
>
> I am trying to calculate the out of band characteristics of antennas.
> My first cut was to model a 1/4 wave ground plane, excite it with 1 V
> and look at the field. Then extrapolating back to find the voltage
> required to produce my Spec. I get a VERY large number. I am using
> Win-NEC Pro. What am I missing? Is there a better way.

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