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    • 1. 发明授权
    • Bulk acoustic wave resonator and circuit comprising same
    • 体声波谐振器和包括其的电路
    • US07616079B2
    • 2009-11-10
    • US10530507
    • 2003-09-18
    • Pasi TikkaRalph StömmerEdgar SchmidhammerMichael Unterberger
    • Pasi TikkaRalph StömmerEdgar SchmidhammerMichael Unterberger
    • H03H9/205H03H9/54
    • H03H9/583
    • The invention relates to a resonator operating with bulk acoustic waves (BAW resonator, BAW=Bulk Acoustic Wave) and band-pass filters constructed of such resonators. To increase the edge steepness of the transmission band of a BAW band-pass filter, the invention proposes reducing the effective coupling of a BAW resonator by using the connection in parallel of a BAW resonator and a capacitor instead of only one resonator. In addition, to increase the edge steepness of the transmission band, the use of a connection of coupled BAW resonators in the serial branch of a filter circuit with another resonator or resonator stack in the parallel branch of the filter circuit is proposed, the additional resonator or resonator stack being connected to the center electrode of the resonator stack specified initially.
    • 本发明涉及一种使用体声波(BAW谐振器,BAW =体声波)和由这种谐振器构成的带通滤波器的谐振器。 为了增加BAW带通滤波器的传输频带的边缘陡度,本发明通过使用与BAW谐振器和电容器并联的连接而不是只有一个谐振器来降低BAW谐振器的有效耦合。 此外,为了增加传输频带的边缘陡度,提出了在滤波器电路的并联支路中使用与滤波器电路的串行分支中的另一谐振器或谐振器堆叠的耦合的BAW谐振器的连接,附加谐振器 或谐振器堆叠连接到最初指定的谐振器叠层的中心电极。