A coupled PEC-TDS surface integral equation approach for electromagnetic scattering and radiation from composite metallic and thin dielectric objects

The recently proposed surface electric field integral equation for thin dielectric sheets is combined with that for conductors to handle objects consisting of both dielectric and conducting materials. This leads to coupled conducting-dielectric surface integral equations which can easily be solved by the method of moments. This approach can handle both scattering and radiation problems such as coated objects, radome enclosed antennas and scatterers, and planar structures. It is observed that the normal electric field in a thin dielectric layer is indispensable when this dielectric layer resides in the vicinity of a conducting object. To validate this approach, couple numerical examples are examined. The results by this approach show agreement with other methods while it economizes on computation resource. It can be used to obtain rapid solutions in the initial phase of the design process. More importantly, it indicates the feasibility for microwave planar circuit applications.