Ridged waveguide filter optimization using an improved simplex method

In this paper, we apply robust optimizers (i. e. the simplex method and the genetic algorithm) to rectangular ridged waveguide filter design. We extend the use of the simplex method to the design of high performance filters in narrower relative bandwidth. The proposed optimization tool is successfully applied to narrower bandwidth of four pole and six pole rectangular ridged waveguide filters. The results outperform those produced by the conventional simplex method and genetic algorithm.