Field iterative method for PEC cavity modeling

Abstract

The field iterative method (FIM) based on an accurate equivalent model of large PEC cavity is discussed. The FIM employs a two-stage iterative process that yields the actual fields or currents, that include diffraction effects and demonstrated the edge condition. It is observed that the accuracy of the FIM based on the simple equivalent model can be significantly improved by introducing a relaxation factor to the magnetic field on the cavity walls. The result shows that the accuracy of the 3D implementation of the FIM using the newly developed point matching method is the same as that of the conventional Galerkin's method.