A new class of bandpass frequency selective structures

This work presents a new approach for designing frequency selective surfaces. In this approach the FSS is composed of AFA cells, which receive, filter. and transmit the signal. Two types of 3-pole bandpass FSS have been designed using the AFA approach. which demonstrate the application of this technique for synthesizing all-pole as well its more complicated bandpass FSSs. Finite element simulations predict an excellent performance for these designs at normal incidence. Prototypes of these FSSs are currently being fabricated, which will be used to verify the numerical results and determine the performance limitations such as insertion loss and angular sensitivity.