Title:
90度ハイブリッド回路
Document Type and Number:
Japanese Patent JP4373954
Kind Code:
B2
Abstract:
Four variable reactance means (10-13) are connected, respectively, to the four ports (1-4) of a quadrature hybrid circuit which is composed of four ring-linked two-port circuits (180-183) each composed of a transmission line or multiple lumped reactance elements, so that by changing the reactance values of the four variable reactance means (10-13), operating frequency of the quadrature hybrid circuit can be selectively changed.
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Inventors:
Atsushi Fukuda
Koji Okazaki
Shoichi Narahashi
Koji Okazaki
Shoichi Narahashi
Application Number:
JP2005113792A
Publication Date:
November 25, 2009
Filing Date:
April 11, 2005
Export Citation:
Assignee:
NTT DoCoMo, Inc.
International Classes:
H01P5/22; H01P1/15; H03H7/48
Domestic Patent References:
| JP6216687A | ||||
| JP64080101A | ||||
| JP5251964A | ||||
| JP1088501U | ||||
| JP8097602A | ||||
| JP2002368566A | ||||
| JP2002076844A | ||||
| JP2000295003A | ||||
| JP2000209007A | ||||
| JP7226609A | ||||
| JP5067904A |
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Taku Kusano
Yukio Nakamura
Taku Kusano