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Extension of the MoM/PO Hybrid Technique to Homogeneous Dielectric Bodies


U. Jakobus

Institut fur Hochfrequenztechnik, University of Stuttgart

A current-based technique hybridizing the method of moments (MoM) with physical optics (PO) is extended in its range of application from perfectly conducting bodies to scattering problems composed of metallic and homogeneous dielectric bodies. To treat electrically large dielectrics, the electric and magnetic surface current densities resulting from an application of the equivalence principle are approximated by PO, thus avoiding the need of solving a large system of linear equations. In an example the exact solution of a short dipole antenna radiating in front of a dielectric sphere is compared to the numerical results. MoM results are almost identical to the exact values, while PO leads to a drastic reduction of memory and CPU-time with results still accurate enough for most applications.

Conference Proceedings of the 14th Annual Review of Progress in Applied Computational Electromagnetics

1998

March

II


920 - 927