A dyadic Green's function for the plano-concave quasi-optical resonator

Analysis of finite grid structures with lenses in quasi-optical systems

“…The driving point reflection coefficient was computed and measured at the node and with all the other gaps left opened and is shown in Figs. 7-9 for the extended unit cell, 3 3 grid, and 5 5 grid. The extended unit cell was used instead of a standard unit cell to match resonant frequencies with the 3 3 and 5 5 grids.…”

“…The approach used in [2], [3] to develop a dyadic Green's function for a QO open-cavity resonator is used here to develop a Green's function for the system shown in Fig. 1.…”

“…The QO modeling approach pioneered by the authors [1]- [5], uses a full-wave moment-method technique and an electric-field QO dyadic Green's function. A series of developments [1]- [3] culminated in a straightforward methodology for developing a novel Green's function of a QO system. The electric-field dyadic Green's function of a QO system is derived in two parts: one part describing the effect of the QO paraxial fields and the other part describing the remaining fields.…”

“…1 and incorporate it into the moment-method routine developed in [4]. Simulations and measurements of a unit cell, a 3 3 grid, and a 5 5 grid, all on dielectric substrates and placed in the lens system, are performed to verify the Green's function. Results for finite grid structures in free space were presented in [5].…”