发明授权
US08350643B2 High frequency device, filter, duplexer, communication module, and communication apparatus
有权
高频设备，滤波器，双工器，通信模块和通信设备
- 专利标题： High frequency device, filter, duplexer, communication module, and communication apparatus
- 专利标题（中）： 高频设备，滤波器，双工器，通信模块和通信设备
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申请号： US12571205申请日： 2009-09-30
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公开(公告)号： US08350643B2公开(公告)日： 2013-01-08
- 发明人: Shogo Inoue , Jun Tsutsumi , Motoaki Hara , Masufumi Iwaki , Takashi Matsuda , Masanori Ueda
- 申请人： Shogo Inoue , Jun Tsutsumi , Motoaki Hara , Masufumi Iwaki , Takashi Matsuda , Masanori Ueda
- 申请人地址： JP Tokyo
- 专利权人： Taiyo Yuden Co., Ltd.
- 当前专利权人： Taiyo Yuden Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Chen Yoshimura LLP
- 优先权： JP2009-020357 20090130
- 主分类号： H03H7/42
- IPC分类号： H03H7/42 ; H03H7/46 ; H03H9/70
摘要：
In a high frequency device, resonators (IDT capacitors) that function as capacitors are included in a lumped constant balun included in a filter or duplexer, and furthermore, the resonance frequency of the IDT capacitors is set higher than the passband frequency of the filter. This improves the capacitor Q value, thus enabling the realization of a low-loss balance filter.
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