A three-dimensional finite element method hybridized with the spectral and spatial domain method of moments is presented for the analysis of ferrite-tuned cavity-backed slot antennas. The cavity, which is partially filled with magnetized ferrite layers, is flush mounted on an infinite ground plane with possible dielectric or magnetic overlay. The antenna operates primarily in the ultra high frequency band. The finite element method is used to solve for the electric field distribution inside the cavity whereas the spectral domain approach is used to solve for the exterior region. An asymptotic extraction of the exponential behavior of the Green's function followed by a spatial evaluation of the resulting integral is used to improve computational speed. Radar cross section of ferrite-tuned cavity-backed slots are calculated for various biasing conditions. Numerical results are compared with data from the literature.
|Number of pages||10|
|Journal||International Series on Advances in Boundary Elements|
|Publication status||Published - 2001|