Invention Grant
- Patent Title: Multi-band-high-frequency circuit, multi-band high-frequency circuit component and multi-band communication apparatus using same
- Patent Title (中): 多频段高频电路，多频段高频电路组件和多频带通信装置
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Application No.: US11721496Application Date: 2005-12-06
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Publication No.: US08131226B1Publication Date: 2012-03-06
- Inventor: Shigeru Kemmochi , Kazuhiro Hagiwara , Keisuke Fukamachi , Takahiro Yamashita , Masayuki Uchida , Mitsuhiro Watanabe
- Applicant: Shigeru Kemmochi , Kazuhiro Hagiwara , Keisuke Fukamachi , Takahiro Yamashita , Masayuki Uchida , Mitsuhiro Watanabe
- Applicant Address: JP Tokyo
- Assignee: Hitachi Metals, Ltd.
- Current Assignee: Hitachi Metals, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2004-360126 20041213; JP2005-180706 20050621
- International Application: PCT/JP2005/022393 WO 20051206
- International Announcement: WO2006/064691 WO 20060622
- Main IPC: H04B1/44
- IPC: H04B1/44
Abstract:
A high-frequency circuit comprising a high-frequency switch circuit for switching the three-way connection of an antenna to a transmitting circuit for the first communications system, a receiving circuit for a first communications system, and a transmitting/receiving circuit for a second communications system; a first bandpass filter disposed between the antenna and the high-frequency switch circuit; and a balanced-unbalanced conversion circuit disposed between the receiving circuit of the first communications system and the high-frequency switch circuit.
Information query
