NUMERICAL SIMULATIONS FOR FREQUENCY-SELECTIVE SCREENS WITH COMPLEMENTARY ELEMENTS

Frequency-selective screens (FSS) with conductor and aperture arrays o n dielectric substrates called normal and inverse types, respectively, are analysed. In the case of the inverse type FSS, the moment method is applied in the spectral domain to the magnetic field equation to ge t the magnetic current distribution induced on the aperture. For the n ormal type FSS, the electric field equation is solved and the electric current distribution on the conductor obtained. Numerical results are given and the scattering properties of inverse and normal type FSSs w ith complementary elements are considered.