Analysis of Electromagnetic Scattering and Radiation From Finite Microstrip Structures Using an EFIE-PMCHWT Formulation

An EFIE-PMCHWT formulation is obtained in an easy manner for finite microstrip structures when they are regarded as separate conducting and dielectric bodies. By simply eliminating equivalent magnetic surface currents on the dielectric interface where the conductor is attached to, the formulation is reduced to a formulation which is identical to that originally proposed for conductors with partial dielectric coatings. Using the resulting EFIE-PMCHWT formulation, electromagnetic radiation from a patch antenna due to a localized voltage source on the conducting patch is computed. Good agreement is observed between the calculated and measured radiation patterns.