Abstract
The article proposes a method for synthesizing Chebyshev bandpass filters (BPFs), based on bulk-acoustic-wave resonators, taking into account the influence of electromechanical parameters of all layers of multilayer resonators. Classical synthesis of a prototype filter with additional reactive elements makes it possible to formulate requirements on the frequency properties of the resonators in a BPF in order to obtain uniform ripple in the transmission band. The method is supplemented by an analytical model of the input impedance of the bulk-acoustic-wave resonators, which takes into account the electroacoustic structural parameters, derived from an experimental study of test resonators. A third-order bandpass filter based on bulk acoustic resonators is synthesized as a multilayer structure, acoustically isolated from the substrate.
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ACKNOWLEDGMENTS
We are grateful to N.I. Katsavets and Svetlana-Rost for providing the experimental results, which are used in this study.
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Translated by A. Sin’kov
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Turalchuk, P.A., Vendik, I.B. Synthesis of Bulk-Acoustic-Wave Bandpass Filters Taking into Account the Material Parameters of the Resonators Mulilayer Structure. Acoust. Phys. 68, 569–574 (2022). https://doi.org/10.1134/S1063771022050116
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DOI: https://doi.org/10.1134/S1063771022050116