Numerical investigation of cavity backed aperture antennas

The authors apply the equivalence principle and the generalized network formulation to model the tangential electric field of multiple arbitrarily shaped apertures backed by a rectangular cavity, in terms of equivalent magnetic currents. The result is an integral equation for the unknown aperture current. This integral equation is then reduced to a matrix equation using the method of moments. The method is used to investigate the characteristics of these aperture antennas in particular the end-loaded, and H-antennas are reported