发明授权
- 专利标题: High frequency switch, two-band type high frequency switch, three-band type high frequency switch, and mobile communication equipment
- 专利标题(中): 高频开关,双频段高频开关,三频段高频开关和移动通信设备
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申请号: US10382011申请日: 2003-03-05
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公开(公告)号: US06835968B2公开(公告)日: 2004-12-28
- 发明人: Shoichi Kitazawa , Masaharu Tanaka , Toshio Ishizaki , Toru Yamada
- 申请人: Shoichi Kitazawa , Masaharu Tanaka , Toshio Ishizaki , Toru Yamada
- 优先权: JP2000-397649 20001227
- 主分类号: H01L2974
- IPC分类号: H01L2974
摘要:
A high frequency switch, has a transmitting terminal; a receiving terminal; an antenna terminal; a first diode having an anode electrically connected to the transmitting terminal and a cathode electrically connected to the antenna terminal; a second diode having an anode connected through a transmission line of ¼ wavelength to the antenna terminal which is electrically connected to the receiving terminal, and having the side of a cathode grounded; and a control terminal provided to a node between the transmitting terminal and the first anode, wherein the first and second diodes have a tradeoff relationship between ON resistance thereof and capacitance between the anode and the cathode, and the ON resistance of the first diode is lower than the ON resistance of the second diode, and the capacitance of the second diode in the OFF state is smaller than the capacitance of the first diode in the OFF state.
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