Computer-aided design of multilayered dielectric frequency-selective surfaces for circularly polarized millimeter-wave applications

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Abstract
A procedure for the computer-aided design of dielectric-layered frequency-selective surfaces is introduced. Emphasis is placed on millimeter-wave applications involving circularly polarized incident signals. The design routine incorporates filter theory for high-low impedance structures and analysis concepts known from thin-film optics which include the losses of the materials. For given material constants and performance specifications, the exact thicknesses of the dielectric layers as well as the angle of the incident wave are determined by applying optimization strategies. A 40-GHz design example demonstrates the attractiveness of the design in circularly polarized millimeter-wave frequency-selective surface applications.