**Vissarion G. Iatropoulos, Minodora-Tatiani Anastasiadou and Hristos T. Anastassiu \***

Department of Informatics, Computer and Communications Engineering, International Hellenic University, Serres Campus, End of Magnisias Str., GR-62124 Serres, Greece; viss.iatr@gmail.com (V.G.I.); minodoratatiana@hotmail.com (M.-T.A.)

**\*** Correspondence: hristosa@teiser.gr

Received: 17 February 2020; Accepted: 23 March 2020; Published: 27 March 2020

**Abstract:** The method of auxiliary sources (MAS) is utilized in the analysis of Transverse Magnetic (TM) plane wave scattering from infinite, conducting, or dielectric cylinders, including curved wedges. The latter are defined as intersections of circular arcs. The artificial surface, including the auxiliary sources, is shaped in various patterns to study the effect of its form on the MAS accuracy. In juxtaposition with the standard, conformal shape, several deformations are tested, where the auxiliary sources are forced to approach the tip of the wedge. It is shown that such a procedure significantly improves the accuracy of the numerical results. Comparisons of schemes are presented, and the optimal auxiliary source location is proposed.

**Keywords:** method of auxiliary sources (MAS); electromagnetic scattering; wedge; numerical methods; accuracy
