Title:
可変共振器
Document Type and Number:
Japanese Patent JP4634912
Kind Code:
B2
Abstract:
A variable resonator has a dielectric substrate 2, an input/output line 3 formed on the dielectric substrate 2, a first resonator 4 that has one end connected to the input/output line 3 and the other end grounded, and a second resonator that has one end connected to the input/output line 3 at the point of connection of the one end of the first resonator 4 and the other end grounded via a terminal switch 7. When the terminal switch 7 is turned off, resonance occurs at a frequency at which the sum of the line lengths of the first resonator 4 and the second resonator 6 equals to a quarter of the wavelength. When the terminal switch 7 is turned on, resonance occurs at a frequency at which a half of the sum of the line lengths equals to a quarter of the wavelength.
Inventors:
Kunihiro Kawai
Atsushi Fukuda
Koji Okazaki
Shoichi Narahashi
Atsushi Fukuda
Koji Okazaki
Shoichi Narahashi
Application Number:
JP2005323451A
Publication Date:
February 16, 2011
Filing Date:
November 08, 2005
Export Citation:
Assignee:
NTT DoCoMo, Inc.
International Classes:
H01P7/08; H01P1/203; H01P1/212
Domestic Patent References:
| JP2003023304A | ||||
| JP2002335109A | ||||
| JP9008505A | ||||
| JP2000101380A | ||||
| JP1200726A | ||||
| JP2005253059A |
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Taku Kusano
Yukio Nakamura
Taku Kusano