发明名称 |
Surface acoustic wave device and communication device including same |
摘要 |
A surface acoustic wave device having an unbalanced-to-balanced conversion function, which is capable of improving balanced characteristics, includes a first resonator filter and a second resonator filter, having a plurality of interdigital transducers disposed along the propagation direction of a surface acoustic wave. The surface acoustic wave device has an unbalanced-to-balanced conversion function as a result of the phase of the second resonator filter being reversed by 180° with respect to that of the first resonator filter. The surface acoustic wave device further includes a first resonator connected in series to an unbalanced signal terminal side of the first resonator filter, and a second resonator connected in series to an unbalanced signal terminal side of the second resonator filter. The first resonator and the second resonator have different design parameters.
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申请公布号 |
US2003168932(A1) |
申请公布日期 |
2003.09.11 |
申请号 |
US20030348189 |
申请日期 |
2003.01.22 |
申请人 |
SHIBATA OSAMU;TAKAMINE YUICHI |
发明人 |
SHIBATA OSAMU;TAKAMINE YUICHI |
分类号 |
H03H9/64;H01L41/08;H03H9/145;H03H9/25;(IPC1-7):H03H9/25 |
主分类号 |
H03H9/64 |
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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