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Title:
HIGH FREQUENCY AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2023/017754
Kind Code:
A1
Abstract:
This high frequency amplifier includes: an amplifier that amplifies a high frequency signal; and an impedance adjustment unit that adjusts, in consideration of a load side, impedance relative to a high frequency wave from the amplifier side. The impedance adjustment unit includes a distributed constant circuit and a lumped constant circuit. The distributed constant circuit includes a transmission line that resonates with the high frequency wave, and the lumped constant circuit includes a resonance circuit that resonates with a fundamental wave and a high frequency wave other than the high frequency wave of the distributed constant circuit. One end of the transmission line of the distributed constant circuit is an open end and is constituted from an open stub provided with a line length that resonates with various high frequency waves. The high frequency amplifier carries out filtering by adjusting the impedance of the fundamental wave and the high frequency wave without being provided with a fundamental wave 1/4 wavelength transmission line.

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Inventors:
KUNITAMA HIROSHI (JP)
YOSHIDA TAKUYA (JP)
Application Number:
PCT/JP2022/029545
Publication Date:
February 16, 2023
Filing Date:
August 01, 2022
Export Citation:
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Assignee:
KYOSAN ELECTRIC MFG (JP)
International Classes:
H03F3/60; H01P5/02; H03F3/189; H03H7/01
Domestic Patent References:
WO2013157298A12013-10-24
Foreign References:
CN111600554A2020-08-28
JP2011055152A2011-03-17
US20020105384A12002-08-08
US20180026589A12018-01-25
US20160322968A12016-11-03
JP2001111362A2001-04-20
JPH09266421A1997-10-07
JPH11234062A1999-08-27
Attorney, Agent or Firm:
AIWA INTERNATIONAL PATENT AGENCY (JP)
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