On combined source solutions for bodies with impedance boundary conditions
Abstract
Studies conducted by Rogers (1984, 1983) regarding impedance boundary condition (IBC) integral equations have been mainly concerned with the spurious interior resonance problem associated with electromagnetic solutions exterior to a closed surface. Specifically, exterior radiation and scattering solutions of the IBC electric and magnetic field integral equations (EFIE and MFI) have nonunique solutions at the interior resonant frequencies of a perfectly conducting cavity having the same shape as the impedance target. In the present investigation, examples are presented of numerical solutions to the IBC combined source integral equation for scattering from impedance spheres. The presented results demonstrate that the IBC combined source integral equation (CSIE) is effective in eliminating the spurious solutions which occur in the electric and magnetic field integral equations.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 April 1985
 DOI:
 10.1109/TAP.1985.1143594
 Bibcode:
 1985ITAP...33..462R
 Keywords:

 Boundary Conditions;
 Boundary Value Problems;
 Electrical Impedance;
 Electromagnetic Scattering;
 Integral Equations;
 Numerical Integration;
 Spheres;
 Backscattering;
 Method Of Moments;
 Resonant Frequencies;
 Scattering Cross Sections;
 Communications and Radar