发明申请
US20110205139A1 BANDPASS FILTER, RADIO COMMUNICATION MODULE AND RADIO COMMUNICATION DEVICE USING THE BANDPASS FILTER
有权
BANDPASS滤波器，无线电通信模块和使用BANDPASS滤波器的无线电通信设备
- 专利标题： BANDPASS FILTER, RADIO COMMUNICATION MODULE AND RADIO COMMUNICATION DEVICE USING THE BANDPASS FILTER
- 专利标题（中）： BANDPASS滤波器，无线电通信模块和使用BANDPASS滤波器的无线电通信设备
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申请号： US13126643申请日： 2009-09-30
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公开(公告)号： US20110205139A1公开(公告)日： 2011-08-25
- 发明人: Hiromichi Yoshikawa
- 申请人： Hiromichi Yoshikawa
- 优先权： JP2008-278115 20081029
- 国际申请： PCT/JP2009/067025 WO 20090930
- 主分类号： H03H7/09
- IPC分类号： H03H7/09 ; H01Q1/50
摘要：
Provided is a bandpass filter which can cope with a wide band and has a large degree of freedom in designing a pass band. Provided also are a radio communication module and a radio communication device using the bandpass filter. The bandpass filter includes a first, a second, and a third resonator (10, 20, 30). The first and the third resonator (10, 30) have a resonance frequency f1 while the second resonator (20) has a resonance frequency f2 which is different from f1. If fe is the even-number mode resonance frequency of a resonance system formed by the first and the third resonator (10, 30) and fo is the odd-number mode resonance frequency, f2 is lower or higher than both of fe and fo. The bandpass filter has a pass band including fe, fo, and f2.
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