发明名称 |
Surface acoustic wave filter and communication device using the filter |
摘要 |
A surface acoustic wave filter has a piezoelectric substrate; at least an input IDT electrod arranged on a piezoelectric substrate; and at least an output IDT electrod arranged on the piezoelectric substrate. A pitch of electrode fingers of the input IDT electrode and a pitch of electrode fingers of the output IDT electrode are different from each other.
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申请公布号 |
US6674345(B2) |
申请公布日期 |
2004.01.06 |
申请号 |
US20020196433 |
申请日期 |
2002.07.15 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., INC. |
发明人 |
NAKAMURA HIROYUKI;NISHIMURA KAZUNORI;TSUNEKAWA AKIO |
分类号 |
H03H9/00;H03H9/145;H03H9/64;(IPC1-7):H03H9/64;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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