Abstract

Electromagnetic analysis for microstrip antennas is formulated by volume-surface integral equations (VSIEs) in which the conducting part is described with surface integral equations (SIEs) while the dielectric substrate is governed by volume integral equations (VIEs). The VSIEs are usually solved by the method of moments (MoM) with the basis functions requiring conforming meshes. We propose a mixed scheme to solve the VSIEs by combining the traditional MoM for the conducting part and a point-matching scheme for the dielectric part. The approach uses cuboids to discretize the dielectric substrate and can overcome certain weaknesses of the traditional approach. A typical numerical example is presented to demonstrate the approach and good result has been obtained.

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