Multiband Single-Layer Frequency Selective Surface Designed by Combination of Genetic Algorithm and Geometry-Refinement Technique

TLDR

The study proposes an optimization‑design method for a frequency selective surface using a genetic algorithm combined with a geometry‑refinement technique. The method incorporates connectivity constraints to simplify fabrication and designs a multiband single‑layer FSS that transmits L and S bands while reflecting Ka band. The resulting FSS achieves broader bandwidths than prior designs and its performance is confirmed by close agreement between simulated and measured transmission responses.

Abstract

This paper proposes an optimization-design method for the frequency selective surface (FSS) based on the genetic algorithm (GA) incorporated with a geometry-refinement technique. The present method takes the connectivity condition of the elements into consideration, thereby resulting in an easy fabrication. As an example, we design the multiband single-layer FSS for transmitting L band (1.5 GHz band) and S band (2.5 GHz band) and also reflecting Ka band (20/30 GHz band). The designed FSS has bandwidths broader than previous FSSs. Finally, the validity of the present method is proved by the agreement between the calculated and the measured transmission responses for the designed FSS.