Optimization of Frequency Selective Surface with Simple Configuration Based on Comprehensive Formation Method

摘要

A new approach to design a frequency selective surface (FSS) is presented based on optimizing the shape of its unit cell geometry. A method based on spline concept has been adopted to specify geometrical features of the elements. In the design process, a hybrid optimization process including genetic algorithm and pattern search method has been used for this purpose. The shape of the structure is improved in each iteration based on specific fitness function. The commercial software CST is used for accurate analysis of structures along the optimization process. A VBA code is developed in order to link Matlab code, which includes optimization tools, and analyzer software CST. This method is used to develop band-pass and band-stop FSSs. Our simulated results show that the transmission and reflection characteristics of the designed FSS are very good in specified frequency band.