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Computer-aided diagnosis and tuning of cascaded coupled resonators filters

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4 Author(s)
Heng-Tung Hsu ; Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD, USA ; Hui-Wen Yao ; K. A. Zaki ; A. E. Atia

A model for the determination of the individual resonant frequencies and inter-resonator couplings of a system consisting of cascaded coupled resonators is presented. Measuring or computing the phase of the reflection coefficient of short-circuit terminated networks synthesizes all the inter-resonator couplings and resonant frequencies. The loading effect on the last resonator due to the unknown position of the short-circuit reference plane is accurately accounted for by a systematic method. A deterministic finite steps tuning method based on the model is developed. The method is proven successful experimentally and the noniterative nature of the method makes fully automatic tuning of filters possible

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:50 ,  Issue: 4 )