Title:
FILTER AND AMPLIFIER CIRCUIT
Document Type and Number:
Japanese Patent JP2011066822
Kind Code:
A
Abstract:
To reduce a line length of a transmission line in a filter that prevents odd-numbered harmonics.
The filter 3 includes stubs 20, 21 that branches from the transmission line 10 and resonance units 30, 30-1, 30-2, 31 that is electromagnetically coupled with the stubs 20, 21 and that resonates with the odd-numbered harmonics of a basic wave transmitted in the transmission line 10.
Inventors:
HONDA KOKI
MAEDA HIROAKI
OKAZAKI YOSUKE
SHIZAWA YOSHINOBU
MAEDA HIROAKI
OKAZAKI YOSUKE
SHIZAWA YOSHINOBU
Application Number:
JP2009217547A
Publication Date:
March 31, 2011
Filing Date:
September 18, 2009
Export Citation:
Assignee:
FUJITSU LTD
International Classes:
H01P1/203; H03F1/02; H01P1/205; H01P1/212; H01P7/08; H03F3/193; H03F3/21; H03F3/60
Domestic Patent References:
| JP2007251403A | 2007-09-27 | |||
| JPH07336167A | 1995-12-22 | |||
| JPH05243873A | 1993-09-21 | |||
| JPH0537204A | 1993-02-12 | |||
| JP2003037459A | 2003-02-07 | |||
| JP2006185936A | 2006-07-13 | |||
| JPH06204764A | 1994-07-22 |
Attorney, Agent or Firm:
Atsushi Aoki
Koichi Itsubo
Higuchi Souji
Masami Enohara
Ryu Kobayashi
Koichi Itsubo
Higuchi Souji
Masami Enohara
Ryu Kobayashi
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