Invention Grant
US08760244B2 Multirole circuit element capable of operating as variable resonator or transmission line and variable filter incorporating the same
失效
能够作为可变谐振器或传输线工作的多功能电路元件以及包括其的可变滤波器
- Patent Title: Multirole circuit element capable of operating as variable resonator or transmission line and variable filter incorporating the same
- Patent Title (中): 能够作为可变谐振器或传输线工作的多功能电路元件以及包括其的可变滤波器
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Application No.: US13040717Application Date: 2011-03-04
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Publication No.: US08760244B2Publication Date: 2014-06-24
- Inventor: Kunihiro Kawai , Hiroshi Okazaki , Shoichi Narahashi
- Applicant: Kunihiro Kawai , Hiroshi Okazaki , Shoichi Narahashi
- 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: JP2010-049126 20100305
- Main IPC: H01P7/00
- IPC: H01P7/00 ; H01P1/203 ; H01P5/00 ; H01P1/12
Abstract:
A variable resonator includes a first transmission line 101, a second transmission line 102 and a plurality of switch circuits 150. The electrical length of the first transmission line 101 is equal to the electrical length of the second transmission line 102. The characteristic impedance for the even mode of the first transmission line 101 is equal to the characteristic impedance for the even mode of the second transmission line 102. The characteristic impedance for the odd mode of the first transmission line 101 is equal to the characteristic impedance for the odd mode of the second transmission line 102. Each switch circuit 150 is connected to any of the first transmission line 101 and the second transmission line 102, and one of the switch circuits 150 is turned on.
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