Scattering from a cavitybacked slit in a ground plane  TE case
Abstract
Twodimensional transverse electric (TE) wave scattering from a cavitybacked slit in a ground plane is analyzed using the generalized network formulation of Harrington and Mautz (1976). The admittance matrix of a cavity of arbitrary shape and medium is obtained by the finiteelement method. A variational equation for the cavity problem is established and then discretized to a matrix equation. An efficient algorithm using the modified frontalsolution algorithm is developed to solve the matrix equation. The solution is manipulated to get the admittance matrix of the cavity. The computed admittance matrix is added to the radiation admittance matrix of the equivalent magnetic current on a ground plane and is used to solve for the equivalent magnetic current on the slit. Numerical results for trapezoidal and coated rectangular cavities are included.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 October 1990
 DOI:
 10.1109/8.59763
 Bibcode:
 1990ITAP...38.1523J
 Keywords:

 Cavities;
 Electric Conductors;
 Electromagnetic Scattering;
 Finite Element Method;
 Plane Waves;
 Wave Scattering;
 Algorithms;
 Electrical Impedance;
 Matrices (Mathematics);
 Slits;
 Communications and Radar