RESPONSE FEATURES AND CIRCUIT DECOMPOSITION FOR ACCELERATED EM-DRIVEN DESIGN OF COMPACT IMPEDANCE MATCHING TRANSFORMERS

摘要

In this letter, a procedure for low-cost simulation-driven design optimization of compact impedance matching transformers is presented. The proposed methodology exploits a bottom-up design with the design requirements for the entire transformer circuit being translated into specifications for its building blocks, here, compact microstrip resonant cells. These elementary cells are optimized using response features which permits considerable numerical savings compared to conventional approach. Subsequently, the entire circuit is fine-tuned using local response surface approximation models and response correction methods. A three-section 50-to-100 Omega transformer is designed for demonstration purposes. Its optimized design is obtained at the computational cost corresponding to only 31 evaluations of the high-fidelity electromagnetic transformer model, despite large number of geometry parameters to be adjusted ( here, 15). (C) 2016 Wiley Periodicals, Inc.