发明名称 |
HIGH-FREQUENCY COMPOSITE SWITCH MODULE |
摘要 |
<p>A radio frequency (RF) hybrid switch module includes an antenna duplexer integrated with a surface acoustic wave (SAW) filter used in a mobile communication device such as a cellular phone. The switch module handles a transmitted signal and received signal of different frequency bands. A parasitic inductance due to a mounting of the SAW filter is reduced, so that an attenuation characteristic at a low frequency of the SAW filter is improved. The RF hybrid switch module includes: a dividing circuit; a switching circuit; a low pass filter (LPF); an electrode for forming at least a portion of the dividing circuit, switching circuit, and the LPF; a laminated body including a dielectric layer having the electrode formed thereon; a SAW filter which is mounted on the laminated body, corresponds to plural frequency bands, and has a grounding port; a diode mounted on the laminated body for forming a portion the switching circuit, a grounding electrode formed in the laminated body, and a via-conductor directly connecting the grounding port of the SAW filter. <IMAGE></p> |
申请公布号 |
EP1235357(A1) |
申请公布日期 |
2002.08.28 |
申请号 |
EP20010974707 |
申请日期 |
2001.10.05 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TSURUNARI, TETSUYA;SATO, YUKI;OMORI, YOSHIHARU |
分类号 |
H01L23/12;H04B1/40;H01L25/00;H03H7/46;H03H9/05;H03H9/25;H03H9/60;H03H9/64;H03H9/72;H04B1/44;H04B1/48;(IPC1-7):H04B1/40 |
主分类号 |
H01L23/12 |
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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