Abstract

Transient electromagnetic scattering by dielectric objects is formulated through time-domain electric field integral equations (TDFEIEs). The TDEFIEs are usually solved by combining the method of moments (MoM) in space domain and march-on-in-time (MoT) scheme in time domain. In the space-domain MoM, the magnetic current density is expanded by the n×RWG basis function and this could be problematic since it is not divergence- or curl-conforming. Also, the MoT scheme has a well-known late-time instability problem which will aggravate in the TDEFIEs with penetrable media. We present a different scheme to remedy those problems by using the Nystrom method to discretize the space domain and Galerkin method with Laguerre functions to discretize the time domain. The presented numerical example has demonstrated its effectiveness.

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