Andre Fourie <fourie_at_odie.ee.wits.ac.za> wrote:
>We have simulated circular patches with feed networks to provide circular
>polarization using NEC-2 with FREE SPACE as dielectric. We used wire grids
>above a perfect ground plane and even if actual devices will incorporate some
>dielectric I believe some very useful information can be obtained....
With NEC-2 I simulated a (rectangular) patch by means of a suitably dense,
horizontal, wire mesh above a ground plane; then, to simulate a
dielectrically loaded patch, I connected short vertical wires between the
mesh and the ground plane, with capacitive loads (negative-imaginary
impedance) inserted in these wires. The simulation results seemed
realistic, but I never totally convinced myself that these little simulated
capacitors validly represented reality.
Can anyone comment on the validity of this method?
BTW, since a dielectrically loaded patch is small in comparison with a
wavelength, I figured that very few simulated capacitors were sufficient.
So I didn't have to extend NEC's limit on the number of loads allowed.
-C.
Received on Fri Jun 13 1997 - 11:42:57 EDT
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