发明名称 |
SAW DEVICE WITH INCLINED REFLECTORS AND COMMUNICATION DEVICE USING SAW DEVICE |
摘要 |
A SAW device comprises input/output interdigital transducer (IDT) electrodes (11, 12) provided on piezoelectric substrates (10), a first reflector electrode (13) following the input IDT electrode (11), and a second reflector electrode (14) preceding the output IDT electrode (12). The device satisfies the following inequality (1) to provide preferable characteristics in a pass band: 2(theta-5)<=tan-1(D/L)<=2(theta+5) where theta: the inclination (in degree, except zero) of the first or second reflector electrode of the input and output IDT electrodes with respect to a plane perpendicular to the direction in which surface acoustic waves travel. D: the pitch (in micron) of the input and output IDT electrodes in the direction in which surface acoustic waves travel. L: the pitch (in micron) of the first and second reflector electrodes.
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申请公布号 |
US2002163402(A1) |
申请公布日期 |
2002.11.07 |
申请号 |
US20010913043 |
申请日期 |
2001.11.13 |
申请人 |
TSUZUKI SHIGERU;IGAKI TSUTOMU;MATSUNAMI KEN;NISHIMURA KAZUKI |
发明人 |
TSUZUKI SHIGERU;IGAKI TSUTOMU;MATSUNAMI KEN;NISHIMURA KAZUKI |
分类号 |
H03H9/00;H03H9/02;H03H9/145;H03H9/64;(IPC1-7):H03H9/64 |
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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