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2. 发明公开

EP2051377A1 FREQUENCY-VARIABLE ACOUSTIC FILM RESONATOR, FILTER AND COMMUNICATION APPARATUS USING THE SAME 审中-公开
标题翻译： FREQUENZVARIABLER AKUSTISCHER FILMRESONATOR，过滤器KOMMUNIKATIONSVORRICHTUNG DAMIT
公开(公告)号：EP2051377A1
公开(公告)日：2009-04-22
申请号：EP07791742.5
申请日：2007-08-01
申请人： Panasonic Corporation
发明人： NAKATSUKA, Hiroshi , YAMAKAWA, Takehiko , ONISHI, Keiji
IPC分类号： H03H9/17 , H01L41/09 , H03H9/02 , H03H9/54
CPC分类号： H03H9/564 , H03H9/132 , H03H9/542 , H03H9/585 , H03H9/587 , H03H9/605 , H03H2009/02204
摘要： An acoustic thin film resonator including: a first piezoelectric thin film 101; a pair of primary electrodes 103 and 104 for applying an electric signal, which are formed on the first piezoelectric thin film; a second piezoelectric thin film 102 that is disposed so that an oscillation generated in the first piezoelectric thin film propagates to the second piezoelectric thin film; a pair of secondary electrodes 104 and 105 for outputting an electric signal, which are formed on the second piezoelectric thin film; a load 108 that is connected between the secondary electrodes; and a control portion 109 that controls a value of the load. Thereby, an acoustic thin film resonator element is formed so that an electric signal inputted from the primary electrodes is outputted from the secondary electrodes by a piezoelectric effect, and a resonant frequency and an antiresonant frequency are made variable through the control of the value of the load. A resonant frequency and an antiresonant frequency are made variable at the same time without resonant characteristics being deteriorated.
摘要翻译：一种声学薄膜谐振器，包括：第一压电薄膜101; 一对主电极103和104，用于施加电信号，形成在第一压电薄膜上; 第二压电薄膜102被布置成使得在第一压电薄膜中产生的振荡传播到第二压电薄膜; 用于输出形成在第二压电薄膜上的电信号的一对次级电极104和105; 连接在次级电极之间的负载108; 以及控制负载值的控制部109。由此，形成声学薄膜谐振器元件，使得从初级电极输入的电信号通过压电效应从次级电极输出，并且通过控制第二电极的值，使谐振频率和反谐振频率变为可变的加载。谐振频率和反谐振频率同时变化，而谐振特性不变。

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