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JP2009147909A Acoustic coupling resonator having resonance transmission minimum value 审中-公开
标题翻译：具有谐振传输最小值的声学耦合谐振器
公开(公告)号：JP2009147909A
公开(公告)日：2009-07-02
申请号：JP2008241113
申请日：2008-09-19
申请人： Avago Technologies Wireless Ip (Singapore) Pte Ltd , アバゴ・テクノロジーズ・ワイヤレス・アイピー(シンガポール)プライベート・リミテッド
发明人： JAMNEALA TIBERIU , SMALL MARTHA , RUBY RICHARD
IPC分类号： H03H9/56 , H01L41/09 , H01L41/18 , H03H9/17 , H03H9/205
CPC分类号： H03H9/60 , H03H9/584
摘要： PROBLEM TO BE SOLVED: To provide an acoustic resonator filter which can be designed so as to have an enhanced proximity frequency blocking characteristic and to adjust a filter attenuation characteristic in order to block a desired frequency or a frequency range.
SOLUTION: A band pass filter includes input and output terminals 505 and 555, first and second acoustic resonators 510 and 520, and an acoustic coupling layer 530. The first acoustic resonator 510 includes first and second electrodes 512, 514 and a piezoelectric layer 516 formed between these first and second electrodes. A first electrode of the first acoustic resonator is connected to the input terminal. The second acoustic resonator 520 includes first and second electrodes 522, 524 and a piezoelectric layer 526 formed between these first and second electrodes. Acoustic coupling is imparted between the second electrode of the first acoustic resonator and the first electrode of the second acoustic resonator, and the output terminal is connected to the second electrode of the second acoustic resonator. A capacitor 550 is formed to be extended between the input and output terminals, the frequency response of the filter includes at least two transmission zeros.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种可被设计成具有增强的接近频率阻挡特性并且调节滤波器衰减特性以便阻挡期望频率或频率范围的声谐振滤波器。解决方案：带通滤波器包括输入和输出端子505和555，第一和第二声谐振器510和520以及声耦合层530.第一声谐振器510包括第一和第二电极512,514以及压电在这些第一和第二电极之间形成的层516。第一声谐振器的第一电极连接到输入端。第二声谐振器520包括第一和第二电极522,524以及形成在这些第一和第二电极之间的压电层526。在第一声谐振器的第二电极和第二声谐振器的第一电极之间施加声耦合，并且输出端连接到第二声谐振器的第二电极。形成电容器550以在输入和输出端子之间延伸，滤波器的频率响应包括至少两个传输零点。版权所有（C）2009，JPO＆INPIT

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