Antenna design of periodic and aperiodic structures

Frequency selective surfaces (FSSs) have been studied extensively in microwave and optical applications. They can be arranged in either a single layer or multiple layers to eliminate resonant crosstalk and dispersive behavior. Although literature abounds in numerical analysis and electromagnetic applications of FSSs, little has been done on the design optimization approaches for them. We examine a multilayered FSS design using gradient-based optimization methods such as sequential quadratic programming (SQP) to tune both the unit cell dimensions and dielectric layer parameters to achieve the desired frequency response.