发明公开
- 专利标题： FILTER DEVICE
- 专利标题（中）： 过滤设备
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申请号： EP07832108.0申请日： 2007-11-19
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公开(公告)号： EP2106023A1公开(公告)日： 2009-09-30
- 发明人: YAMAKAWA, Takehiko , OKAJIMA, Toshiyuki , NAKATSUKA, Hiroshi , ONISHI, Keiji
- 申请人： Panasonic Corporation
- 申请人地址： 1006, Oaza Kadoma Kadoma-shi Osaka 571-8501 JP
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： 1006, Oaza Kadoma Kadoma-shi Osaka 571-8501 JP
- 代理机构： Eisenführ, Günther
- 优先权： JP2006312591 20061120; JP2006312593 20061120
- 国际公布： WO2008062753 20080529
- 主分类号： H03H7/01
- IPC分类号： H03H7/01 ; H04B1/18
摘要：
A high frequency filter includes an inductor (2), a serial resonance circuit (31) including an inductor (3a) and capacitors (4a and 5a), a serial resonance circuit (32) including an inductor (3b) and capacitors (4b and 5b), and a varactor diode (6) connected between a connection point between the capacitor (4a) and the capacitor (5a) and a connection point between the capacitor (4b) and the capacitor (5b). A controller (1) simultaneously changes two attenuation pole frequencies of the filter device by changing a capacitance of the varactor diode (6).
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