发明名称 |
Surface acoustic wave device and communication apparatus using the same |
摘要 |
IDT electrodes are arranged on a piezoelectric substrate along a propagation direction of a surface acoustic wave whereas reflectors are each interposed between a respective pair of IDT electrodes, the reflectors each including four or more electrode fingers extended perpendicularly to the propagation direction. An electrode-finger pitch 'a' of the reflector is progressively decreased from the opposite ends of the reflector toward the center thereof. Frequencies allowed to pass through a pass band may be controlled by varying the electrode-finger pitch. Thus is provided a surface acoustic wave device featuring a wide-band transmission performance.
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申请公布号 |
US2005001696(A1) |
申请公布日期 |
2005.01.06 |
申请号 |
US20040884827 |
申请日期 |
2004.07.02 |
申请人 |
KYOCERA CORPORATION |
发明人 |
OTSUKA KAZUHIRO;ITO MOTOKI;IIOKA KIYOHIRO;NAKAI TSUYOSHI |
分类号 |
H03H9/00;H03H9/02;H03H9/25;H03H9/64;(IPC1-7):H03H9/72 |
主分类号 |
H03H9/00 |
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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