Analysis of frequency-selective surfaces on a biased ferrite substrate

The solution to the problem of frequency-selective surfaces (FSSs) on both normally and in-plane biased ferrite slabs is formulated using the full-wave moment method. The extra degree of freedom offered by the biased ferrite can be used to adjust the resonant frequency of a FSS in a way that cannot be achieved with ordinary dielectric substrates. Numerical results show that the resonant frequency of an array of cross-dipoles can be adjusted by several gigahertz.