发明名称 |
ACOUSTIC WAVE RESONATOR, ACOUSTIC WAVE FILTER USING THE SAME AND ANTENNA DUPLEXER |
摘要 |
<p>PROBLEM TO BE SOLVED: To provide an acoustic wave resonator capable of increasing the steepness of pass characteristic in a high frequency side transition frequency band of an acoustic wave filter.SOLUTION: An acoustic wave resonator 1 includes: a piezoelectric substrate 2; and a first dielectric film 5 formed so as to cover an IDT electrode 3 that excites a major elastic wave on the piezoelectric substrate, first and second reflector electrodes 4a and 4b which are disposed at both sides of the IDT electrode along a propagation direction of the major elastic wave, the IDT electrode, and the first and second reflector electrodes. The acoustic wave resonator is configured so that at least maximum frequency of a cutoff frequency band at one reflector electrode of the first and second reflector electrodes is lower than an antiresonance frequency of the major elastic wave.</p> |
申请公布号 |
JP2014160888(A) |
申请公布日期 |
2014.09.04 |
申请号 |
JP20130029609 |
申请日期 |
2013.02.19 |
申请人 |
PANASONIC CORP |
发明人 |
KOMATSU TOMOYA;TSURUNARI TETSUYA;FUJIWARA SHIROJI |
分类号 |
H03H9/145;H01L41/09;H01L41/18;H03H9/25;H03H9/64;H03H9/72 |
主分类号 |
H03H9/145 |
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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