Re: NEC-LIST: Question about Average Gain calculation SOLVED

Thanks to Smilin' Chuck...the error was in the angular range for theta.
I had specified theta from -90 to 90 (what was I thinking????)
Of course it needed to be 0 to 180.
I knew it had to be something silly...

At 04:17 2003-03-09, Chuck Vandament wrote:
> Hi Scott,
>One problem, maybe two. The values of Theta in NEC range from 0 deg
>overhead (zenith) to +90 at the horizon to +180 at the nadir. Also, I'm
>not sure how the fortran compiler reads the free field format when you say
>"RP0". I normally use spaces to separate fields; I think it is your choice,
>spaces or commas so I would write that line as RP 0
>
>RP 0 90 180 1001 90. 0. -2. 2.
>
>Good luck,
>Smilin' Chuck
>
>
>At 08:34 PM 3/8/2003 -0700, you wrote:
> > I seem to be doing something wrong...
> >Here is the relevant part of the input file
> >RP0,90,180,1001,-90.,0.,2.,2.
> >Free space,
> >So I think I'm asking for the Average Gain calculation correctly (the
> >'1001' bit)
> >
> >The NEC output says:
> > AVERAGE POWER GAIN= 9.34810E+01 SOLID ANGLE USED IN AVERAGING=(
> >0.0694)*PI STERADIANS.
> >
> >When I tried this with only a 1 degree increment in (theta, phi) I got
> >"SOLID ANGLE=0.0000*PI STER"
> >This seems really odd...
> >The pattern the file generates looks fine; it is pretty directional
> >(reflector antenna with hpbw of 5 degrees) but can't imagine why I would
> >get a zero (or nearly) solid angle.
> >I am using the NEC2D2K8.exe from the NEC-ARCHIVES website.
> >Any clues? Thanks in advance,
> >
> >Scott Townley
> >Gilbert, AZ
> >--
> >The NEC-List mailing list <nec-list_at_gweep.ca>
> >http://www.gweep.ca/mailman/listinfo.cgi/nec-list
> >

Scott Townley NX7U
Gilbert, AZ DM43di

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