Time domain E-PMCHW integral equation solved by adaptive marching-on-in-order procedure for predicting transient responses of some composite structures

Abstract

One adaptive method, based on time-domain E-PMCHW (Poggio, Miller, Chang, Harrington and Wu) integral equation, is presented for predicting transient scattering and radiation responses of some composite structures made of perfectly conducting (PEC) and dielectric materials. Both PEC and dielectric parts are described by the electric field integral equations (EFIE) and the PMCHW ones, respectively, with a set of time domain E-PMCHW equations derived. The common RWG and line basis functions are used to expand surface and wire currents, respectively. The derived equations are then solved by marching-on-in-order (MOO) procedure, where an alternative overall stopping criterion is used in an adaptive way. Some typical numerical results are given to demonstrate its accuracy in capturing transient scattering and radiation responses of some typical composites in the presence of an intentional electromagnetic pulse (IEMP).