Loaded resonators for adjusting frequency response of acoustic wave resonators

Tapani Makkonen (Inventor), Markku Ylilammi (Inventor), Tuomas Pensala (Inventor), James Dekker (Inventor)

    Research output: PatentPatent

    Abstract

    An acoustic wave filter device is disclosed. The device includes an acoustic wave filter element, and a first resonator and a second resonator coupled to the acoustic wave filter element. The acoustic wave filter element includes interdigited input electrodes and output electrodes located on a top surface of a piezoelectric layer and an counter-electrode on the bottom surface of the piezoelectric layer. Each of the first and the second resonators includes a resonator electrode on the top surface of the piezoelectric layer and a resonator counter-electrode on the bottom surface of the piezoelectric layer. The first resonator has a first notch in resonator impedance at a first frequency. The second resonator includes a first mass loading layer on the second resonator electrode such that the second resonator has a second notch in resonator impedance at a second frequency that is different from the first frequency.

    Patent family as of 16.12.2021
    CN112673568 A 20210416 CN201980058209 20190906      
    EP3847748 A1 20210714 EP20190765722 20190906      
    US10790801 BB 20200929 US20180125632 20180907      
    US2020083862 AA 20200312 US20180125632 20180907      
    US2021075401 AA 20210311 US20200034711 20200928      
    WO20049170 A1 20200312 WO2019EP73889 20190906

    Link to currentpatent family on right 

    Original languageEnglish
    Patent numberUS2020083862
    IPCH03H 9/ 17 A I
    Priority date7/09/18
    Publication statusPublished - 12 Mar 2020
    MoE publication typeH1 Granted patent

    Fingerprint

    Dive into the research topics of 'Loaded resonators for adjusting frequency response of acoustic wave resonators'. Together they form a unique fingerprint.

    Cite this