Elastic Wave Device and Module

Abstract: this disclosure relates to an elastic wave device and module. the elastic wave device includes a plurality of series resonators and a plurality of parallel resonators, as well as a bandpass filter that allows signals within a predetermined frequency band to pass through. the plurality of series resonators includes a first series resonator with a first anti-resonant frequency and a second anti-resonant frequency. the first anti-resonant frequency is located near the lowest frequency within the predetermined frequency band, and the second anti-resonant frequency is located above the highest frequency within the predetermined frequency band. this elastic wave device and module address the issue of insufficient steepness between the passband and stopband, thereby enhancing the steepness between the passband and stopband in the elastic wave device.

Inventor(s): Jingri Lian, Shinichi SHIOI

CPC Classification: H03H9/25 (IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (measuring, testing ; arrangements for producing a reverberation or echo sound ; impedance networks or resonators consisting of distributed impedances, e.g. of the waveguide type, ; control of amplification, e.g. bandwidth control of amplifiers, ; tuning resonant circuits, e.g. tuning coupled resonant circuits, ; networks for modifying the frequency characteristics of communication systems ))

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