发明名称 |
Surface acoustic wave filter |
摘要 |
A surface acoustic wave filter having a plurality of the transmission lines, each with one end connected to the surface acoustic wave element and the other end thereof connected to a ground. The transmission lines are divided by an additional transmission line which has multiple connections to a ground electrode at an interval equal to or lower than a wavelength of a using frequency. This structure provides grounds among a plurality of transmission lines and thus isolation among terminals can be increased to improve the filter characteristic.
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申请公布号 |
US7183878(B2) |
申请公布日期 |
2007.02.27 |
申请号 |
US20040526919 |
申请日期 |
2004.08.20 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KUSHITANI HIROSHI;NAKAYA SHINOBU;YASUHO TAKEO |
分类号 |
H03H9/72;H03H9/05;H03H9/10;H03H9/64 |
主分类号 |
H03H9/72 |
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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