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Cross-coupling filter elements in resonant structures with bulk waves having multiple harmonic resonances
Cross-coupling filter elements in resonant structures with bulk waves having multiple harmonic resonances
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机译:共振结构中具有具有多个谐波共振的体波的交叉耦合滤波器元件
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摘要
The elementary filter of the HBAR type includes two resonators (20, 22) of the HBAR type which are each formed by a transducer (8) and a substrate (12) which are coupled in a suitable manner by electroacoustic waves. The first resonator (20), the second resonator (22) and the coupling element (28) by way of evanescent waves include the same monobloc acoustic substrate (12) which is arranged facing and coupled to the piezoelectric transducer (8) by waves having the same longitudinal or transverse vibration mode through the same reference electrode (10).
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