An enhanced multi-circuit optimization approach for identification of microwave filter parameters

This paper presents an efficient multi-circuit optimization approach and its applications to the parameter identification of microwave filters. The approach is based on l₁ norm optimization. It strives to force the modeled response to approximate measured response and at the same time minimize the difference of parameter values between different circuits. The proposed method can not only achieve an excellent match between the measured and the modeled responses, but also enhance the uniqueness of the identified parameters. This approach is illustrated by an eight-order multi-coupled microwave filter example.