Re: NEC-LIST: 4nec2 LATEST. Patches

Miron,
In nec, a surface patch is a patch, not a box. You can make it a box
with 6 patches. Not sure though, how patches are treated in nec. They
don't show currents as in wires, but it does seem to reflect EM waves.
Have not tried to place a 1/4 wave wire inside a Patch Box to see if
fields outside the box couple to it. Would be a neat example to try.

How are dielectrics, other then ground plane, specified in nec? Or maybe
they can not be?

Thanks!
Ken Carrigan

>-----Original Message-----
>From: nec-list-bounces+kcarrigan=anteon.com_at_robomod.net
>[mailto:nec-list-bounces+kcarrigan=anteon.com_at_robomod.net] On
>Behalf Of D. B. Miron
>Sent: Thursday, April 14, 2005 9:28 AM
>To: nec-list_at_robomod.net
>Subject: Re: NEC-LIST: 4nec2 LATEST. Patches
>
>Ken,
>
>The surface patch is for closed structures only, such as a
>box. It is easily confused with "patch" as in patch antenna,
>but it can't be used for a patch antenna because a patch
>;antenna is open all around. I presume that a person wanting
>to model a patch antenna could do so using a wire grid just
>above a ground plane, with the ground plane having the
>properties of the desired substrate. I haven't tried this myself.
>
>Doug Miron
>
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