Multiform frequency selective surfaces optimal design based on topology optimization

This article proposes an optimization design method for various frequency selective surfaces (FSSs) based on topology optimization algorithm incorporated with the genetic algorithm. The present method takes the connectivity condition both in simulation and fabrication of the elements into consideration. For the filling elements structural design methodology, the novel hexagonal-pixel filling element structural design is employed for improving the patch connection. As examples, various FSSs, such as a large-angle-stability band-pass FSS, wideband band-pass FSS, and multiple band-pass FSS, are designed. Furthermore, the validity of the present method is proved by the agreement between the simulation and the measurement.