On layout optimization of the microwave diplexor filter using genetic algorithms

An original application of genetics algorithms in the on layout optimization of the microwave filters is presented. Based on a resonant coupling irises topology, a Ka-band diplexor filter on silicon membrane substrate is tuned in order to improve its performances. The optimization process uses the numerical results given by Sonnet software and the overall process is piloted by a genetic algorithm. A very good acknowledgment between numerical (optimized) and experimental results was obtained.