Fast design and optimization of coupler exploiting tuning space-mapping

Traditional process of microwave components optimization takes advantages of simulation results. By exploiting various methods such as parameter swap, the response gradually meet the final specifications. Nowadays, we fully enjoy the convenience of computer-aided-design (CAD) tools. There are two kinds of simulations. One is circuit-based simulation which is fast but not so accurate. The other one is EM-based simulation which is accurate but its computational cost is high. Space-mapping combine the merits of these two methods, which accelerates the optimization process. Tuning space-mapping inherits the advantages of space-mapping algorithm, meanwhile improving the flexibility. In this article, we design a 30-dB strip line coupler exploiting tuning space-mapping algorithm. Moreover we adjust the design structure considering the problems occurred during the manufacturing process.