An Efficient High-Order Extrapolation Procedure for Multiaspect Electromagnetic Scattering Analysis

This paper presents a new high-order extrapolation procedure for computing multiaspect electromagnetic scattering characteristics for arbitrarily shaped 3-D conducting targets. The method aims to reduce the number of simulation angles required to resolve a monostatic radar cross section when the method of moments is used for perfect electrically conducting targets. The methodology developed in this contribution employs a novel procedure for automatically computing the higher order moments required for the implementation of the asymptotic waveform evaluation extrapolation technique. The method uses the Leibnitz theorem and the Faa di Bruno formula for computing higher derivatives of the incident electric field, with respect to the angles of incidence. Three numerical case studies are provided to demonstrate the validity and efficacy of the new method.