On the Discontinuous Galerkin Surface Integral Equation for Efficient Analysis of Multiscale Antenna-Radome

This study advances the discontinuous Galerkin (DG) integral equation methodology for the analysis of antennas incorporating dielectric slabs and radomes, addressing the increasing spatial-scale contrast challenges in antenna systems due to advanced manufacturing and integration techniques. By integrating the combined field integral equation for dielectric surfaces with the electric field integral equation for metallic structures, we establish a DG discretization framework for surface integral equations for antenna analysis. A novel aspect of our approach is the straightforward definition of basis functions and unknowns at multiple material junctions, which circumvents the complications encountered in traditional conformal mesh-based integral equation methods. Demonstrated through examples, including a multiport patch antenna array encapsulated by a large dielectric radome, our method significantly enhances the flexibility of S-parameter and radiation pattern analysis for the realistic, multiscale antenna with radome configurations.