Time-Domain Generalized Transition Matrix for Transient Scattering Analysis of Arrays

Time-domain generalized transition matrix (TD-GTM) based on the time-domain integral equations (TDIEs) is implemented in this letter. The TD-GTM is established on the reference Huygens surface that encloses the object, using the impulse responses obtained by the marching-on-in-time (MOT) solutions. The TD-GTM fulfills the domain decomposition of TDIEs naturally and flexibly. It allows us to analyze each module independently and then to solve the whole system by establishing the time-domain generalized surface integral equation (TD-GSIE). Various TDIEs are used to extract the TD-GTM for different modules. Numerical results show that the TD-GTM can effectively improve the efficiency of original TDIEs for transient scattering analysis of array structures.