**6. Conclusions**

The method of auxiliary sources (MAS) was applied to scattering from a PEC or dielectric cylinder whose geometry contains curved wedges, formed by intersections of circular arcs. The BC error in the vicinity of the wedge tips is significant for standard, conformal auxiliary surfaces due to field singularities. To overcome such a complication, the deformation of the auxiliary sources was proposed. When close to the tips, both inner and outer (when applicable) ASs approached the CPs, and their distribution was also forced to become denser. The BC error was shown to decrease significantly for both the *E* and the *H* fields, resulting in more accurate RCS results.

**Author Contributions:** Formal analysis, V.G.I., M.-T.A. and H.T.A.; Funding acquisition, H.T.A.; Methodology, V.G.I., M.-T.A. and H.T.A.; Project administration, H.T.A.; Software, V.G.I. and M.-T.A.; Supervision, H.T.A.; Validation, V.G.I. and M.-T.A.; Writing—Original draft, H.T.A.; Writing—Review & editing, V.G.I. and M.-T.A. All authors have read and agreed to the published version of the manuscript.

**Funding:** The authors wish to acknowledge financial support by the Special Account for Research Funds of the International Hellenic University (former Technological Educational Institute of Central Macedonia), Greece, under grant SAT/IE/93/6/28-2-2019/50135.

**Conflicts of Interest:** The authors declare no conflict of interest.
