On Nov 15, 11:40*am, Cecil Moore wrote:
Helmut Wabnig wrote:
How do I simulate a sheet metal or other metal structure in NEC,
when the software only knows (infinitesimally thin) "wires"

One creates a mesh using wires. The openings in the
mesh must be small compared to a wavelength. Here's
how I modeled my pickup - don't know how accurate
it might be.

http://www.w5dxp.com/SHOOTOUT.EZ
--
73, Cecil, IEEE, OOTC, *http://www.w5dxp.com

Correct Cecil, note that you are refering to a wavelength and not a
fractional WL
This is the foundation of a Faraday cage which is the very essence of
a passive radiator. In a mesh the current applied is straight but
broken up into segments
so that the displacement current is also broken up by encircling the
holes. The holes consist of a capacitor or a field that when
intersected by the initial current field produces acceleration to
applied particles while within the confines of the intersection. This
mechanism provides the maximum acceleration possible within the
Universe per Einstein where the particle achieves the same properties
as that exhibited by light and other non visible phenomina such as x
rays etc