Closed-form Green's functions for multilayered structure and its applications [aperture coupled patch antenna example]
An efficient set of closed-form multilayered media Green's functions with general electric and magnetic sources is presented. The spatial-domain Green's functions are obtained by the discrete complex-image method, which obviates the time-consuming numerical evaluation of the Sommerfeld integral. Besides, we present a generalized Sommerfeld identity by which the higher order Sommerfeld integrals can be used in closed form. Numerical results by the Green's function are presented to show the efficiency and accuracy of this method.