发明名称 |
Unidirectional surface acoustic wave device |
摘要 |
In order to present an asymmetric frequency characteristic in an unidirectional acoustic surface wave device with a simple external phase shifter, a transducer formed on a substrate have three interaction areas (acoustic sources) defined by different three electrodes, first electrode being common, second electrode being connected to one end of the phase shifter, third electrode being connected to another end of the phase shifter, and distances between interaction areas being unequal to 2n (n:integer).
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申请公布号 |
US4775846(A) |
申请公布日期 |
1988.10.04 |
申请号 |
US19870097169 |
申请日期 |
1987.09.16 |
申请人 |
HITACHI, LTD. |
发明人 |
SHIBA, TAKASHI;FUJITA, YUJI;TAKAHASHI, TOSHIMITSU;YAMADA, JUN |
分类号 |
H03H9/02;H03H9/145;H03H9/64;(IPC1-7):H03H9/145;H03H9/68 |
主分类号 |
H03H9/02 |
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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