Analysis of thin-strip scatterer by MEI

MEI (Measured Equation of Invariance) has been applied to solve many kinds of electromagnetic radiation and scattering problems. In this paper, we are concerned with the MEI solution and singularity when it is used to analyze scattering problem of metallic thin-strip scatterers. In our analysis, a conformal mesh is employed. A 6-point MEI is used to find the truncation boundary condition. The singularity of MEI exists in the vicinity of the ends of a two-dimensional thin-strip scatterer. For mesh nodes in vicinity of the ends of the thin-strip scatterer, values of the measuring function are very close for the different metrics used. This will result in the ill-conditioning of MEI and MEI coefficients. In this paper, we show this phenomena and our measurement for dealing with such a problem. Numerical results are obtained to compare with those obtained by the Method of Moments.