Computer-aided tuning and diagnosis of microwave filters using sequential parameter extraction

• Published in: 2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535) Vol. 3; pp. 1373 - 1376 Vol.3
• Main Authors: Pepe, G., Gortz, F.-J., Chaloupka, H.
• Format: Conference Proceeding
• Language: English
• Published: Piscataway NJ IEEE 2004
• Subjects: Acoustic wave devices, piezoelectric and piezoresistive devices; Applied sciences; Circuit optimization; Circuit properties; Electric, optical and optoelectronic circuits; Electromagnetic waveguides; Electronic circuits; Electronics; Exact sciences and technology; Frequency response; Manufacturing; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwave filters; Oscillators, resonators, synthetizers; Parameter extraction; Resonant frequency; Resonator filters; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Transmission line matrix methods; Tuning; Performance evaluation; Resonator filters; Resonant coupling; Sequential extraction; Microwave filter; Adaptive method; Parameter extraction; Coupling coefficient; Resonance frequency; Piezoelectric resonator; Diagnostic aid; Computer aid; Coupled resonator
• ISBN: 0780383311; 9780780383319
• ISSN: 0149-645X; 2576-7216
• DOI: 10.1109/MWSYM.2004.1338824

This paper describes an approach to the computer-aided tuning of multiple-coupled resonator filters. The method is based on a sequential parameter extraction and tuning process and employs three different filter models. A detuned model represents the initial status of the filter after a well defined detuning procedure. The target filter is described by the ideal model, whereas the actual state of the filter at each tuning step is represented by a coarse adaptive model. The goal of the procedure is the convergence of the coarse model to the ideal model and will be obtained by systematically centering resonant frequencies and coupling coefficients. Two practical examples comprising a low- and a high-degree filter confirm the effectiveness of the proposed approach.