Invention Grant
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
- Patent Title: High frequency device, filter, duplexer, communication module, and communication apparatus
- Patent Title (中): 高频设备，滤波器，双工器，通信模块和通信设备
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Application No.: US12571205Application Date: 2009-09-30
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Publication No.: US08350643B2Publication Date: 2013-01-08
- Inventor: Shogo Inoue , Jun Tsutsumi , Motoaki Hara , Masufumi Iwaki , Takashi Matsuda , Masanori Ueda
- Applicant: Shogo Inoue , Jun Tsutsumi , Motoaki Hara , Masufumi Iwaki , Takashi Matsuda , Masanori Ueda
- Applicant Address: JP Tokyo
- Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Chen Yoshimura LLP
- Priority: JP2009-020357 20090130
- Main IPC: H03H7/42
- IPC: H03H7/42 ; H03H7/46 ; H03H9/70
Abstract:
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.
Public/Granted literature
- US20100194494A1 HIGH FREQUENCY DEVICE, FILTER, DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS Public/Granted day:2010-08-05
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