发明名称 |
FREQUENCY-VARIABLE ACOUSTIC FILM RESONATOR, FILTER AND COMMUNICATION APPARATUS USING THE SAME |
摘要 |
<p>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.</p> |
申请公布号 |
EP2051377(A1) |
申请公布日期 |
2009.04.22 |
申请号 |
EP20070791742 |
申请日期 |
2007.08.01 |
申请人 |
PANASONIC CORPORATION |
发明人 |
NAKATSUKA, HIROSHI;YAMAKAWA, TAKEHIKO;ONISHI, KEIJI |
分类号 |
H03H9/58 |
主分类号 |
H03H9/58 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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