Abstract
A combined field integral equation (CFIE) with single operator, which is named equalized CFIE (ECFIE) is presented for solving the electromagnetic scatterings from conducting targets with cavities on which surface both the electrical and magnetic currents exist simultaneously. In ECFIE, the different integral operators imposed on unknown electric and magnetic currents are simplified to a single one by properly choosing the coefficients in conventional CFIE. As a result, the computation complexity is dramatically reduced comparing with EFIE, MFIE, and conventional CFIE. Combined with multilevel fast multipole algorithm (MLFMA) and connection scheme (CS), ECFIE is used to simulate the scattering from conducting objects with cavities. The numerical examples presented in this paper demonstrate the validity and high efficiency of this approach.
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