On electromagnetic scattering from perfectly conducting parallel square plates and their resonance characteristics using method of auxiliary sources

This study presents an analysis of the electromagnetic scattering from a perfect electrically conducting (PEC) parallel square double plate, including sharp-edged surfaces, using the Method of Auxiliary Sources (MAS). To extend MAS to non-smooth geometries or geometries with edges, additionally, a dielectric interface is introduced around plates to enforce continuity constraints on the electromagnetic fields, naturally capturing discontinuities and high field intensities near edges. This technique enables MAS to handle piecewise discontinuous or non-smooth structures, ensuring accurate modeling of edge effects. Through numerical simulations, resonance characteristics and field distributions are examined for varying plate dimensions, separation distances, and source positions. The study highlights the impact of these parameters on resonance frequency shifts and amplitude variations, providing valuable insights for resonator design. The findings contribute to the understanding of the resonance behavior of PEC double plates, with potential applications in antennas and radar systems.