At 8:29 AM -0700 10/11/03, Jim Lux wrote:
>How did you model the supporting structure for the antenna?
Mainly I used wire mesh, with wire radius set by the equal-area rule,
to model conducting surfaces. IIRC, I set the center-to-center
spacing of the wires equal to 1/9th of the L1 wavelength, except that
I densified the mesh near the array elements. I remember also trying
surface patches to model conducting surfaces, and coming to the
conclusion that, for the same number of unknowns, NEC did a better
job using wire mesh than using surface patches. I recall asking some
guru (Jerry Burke?) about the use of patches versus wire mesh, and he
confirmed my conclusion. However, I don't recall why he said wires
work better.
BTW, I also modeled a choke-ring antenna for GPS using wire mesh.
IIRC, that modeling worked pretty well, too.
>I'd be interested in the model files....
I've emailed them, and plots from NECPLT and PATPLT, to you directly.
73 -Chuck, W1HIS
-- The NEC-List mailing list <nec-list_at_gweep.ca> http://www.gweep.ca/mailman/listinfo.cgi/nec-listReceived on Sat Oct 11 2003 - 22:55:24 EDT
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