Invention Grant
- Patent Title: Signal switching device
- Patent Title (中): 信号开关装置
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Application No.: US11693402Application Date: 2007-03-29
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Publication No.: US07774034B2Publication Date: 2010-08-10
- Inventor: Kunihiro Kawai , Daisuke Koizumi , Kei Satoh , Shoichi Narahashi , Tetsuo Hirota
- Applicant: Kunihiro Kawai , Daisuke Koizumi , Kei Satoh , Shoichi Narahashi , Tetsuo Hirota
- Applicant Address: JP Tokyo
- Assignee: NTT DoCoMo, Inc.
- Current Assignee: NTT DoCoMo, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2002-324422 20021107; JP2003-015351 20030123
- Main IPC: H01B12/02
- IPC: H01B12/02 ; H01L39/12 ; H01P1/10 ; H03K17/92
Abstract:
A signal switching device including a plurality of transmission paths connected to an input path, the signal switching device outputting a signal from the input path through one of the transmission paths, including a first variable impedance unit connected to a first transmission path, the first variable impedance unit including a first section formed from a superconducting material, the first section being set to a non-superconducting state when the signal is to be output through a second transmission path, the first section including a portion of a predetermined length at an input end, the portion having an area of a cross section less than an area of a cross section of the first section at an output end.
Public/Granted literature
- US20070230450A1 SIGNAL SWITCHING DEVICE Public/Granted day:2007-10-04
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