Field iterative method for PEC cavity modeling

In this paper, the authors summarize the latest developments and extensions of the field iterative method (FIM) done in Temasek Laboratories and in collaboration with Professor Gary Thiele. The first topic discussed is the FlM based on an accurate equivalent model of a large perfect electric conductor (PEC) cavity. The second item discussed is the relaxed form of FIM, based on a simple equivalent model, which is accurate only for small incident angles and large PEC cavity. The third topic is the 3D implementation of the FIM. The accelerated version of the FIM, FAFFA-FIM, is also proposed to reduce the computational expenses of the FIM. These developments and extensions of the FIM provide an efficient approach to calculate the scattering from a PEC cavity structure.