EFIE Solution of Transmitted Electromagnetic Field Through a Perforated Metallic Shield by a Marching-on-in-Degree Approach

An accurate modeling technique is proposed to solve the problem of the penetrated transient field through a perforated metallic shield. In this technique, the method of moments (MoMs) is adopted to treat the governing time-domain electric field integral equation for the unknown electric current density on the metallic surface of the shield. The weighted Laguerre polynomials are used as entire-domain temporal basis functions in the MoM-based technique to set the solution approach by the marching-on-in-degree (MOD) method. To examine the accuracy of the proposed modeling technique, simulated results are presented for a finite and an infinite perfect electric conductor (PEC) plates as well as for a metallic box illuminated by a modulated/unmodulated incident wave. The accuracy of the proposed technique is demonstrated by comparing the simulated results with those obtained using the well-known Computer Simulation Technology (CST) finite integration technique and FEKO frequency-domain MoM.