Title:
DOHERTY AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2022/219799
Kind Code:
A1
Abstract:
This Doherty amplifier is provided with: a filter circuit (6a) that, when an input signal in a first frequency band is input, outputs a first input signal that is the input signal attenuated by a first attenuation amount, and, when an input signal in a second frequency band different from the first frequency band is input, outputs a second input signal that is the input signal that is passed through; a second filter circuit (6b) that, when the input signal in the first frequency band is input, outputs a third input signal that is the input signal attenuated by a second attenuation amount that is smaller than the first attenuation amount, and, when an input signal in the second frequency band is input, outputs a fourth input signal that is the input signal attenuated by a third attenuation amount that is equal to or greater than the first attenuation amount; a first amplifier (8a) that has a fixed gate bias voltage, operates as an auxiliary amplifier when the first input signal from the first filter circuit (6a) is input, and operates as a main amplifier when the second input signal from the first filter circuit (6a) is input; and a second amplifier (8b) that has a fixed gate bias voltage, operates as a main amplifier when the third input signal from the second filter circuit (6b) is input, and operates as an auxiliary amplifier when the fourth input signal from the second filter circuit (6b) is input.
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Inventors:
KOMATSUZAKI YUJI (JP)
SAKATA SHUICHI (JP)
YAMANAKA KOJI (JP)
SAKATA SHUICHI (JP)
YAMANAKA KOJI (JP)
Application Number:
PCT/JP2021/015695
Publication Date:
October 20, 2022
Filing Date:
April 16, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F1/02; H03F1/07; H03F3/68
Domestic Patent References:
| WO2017119062A1 | 2017-07-13 | |||
| WO2019009760A1 | 2019-01-10 |
Foreign References:
| JP2011114492A | 2011-06-09 | |||
| JP2015019275A | 2015-01-29 | |||
| JP2014511166A | 2014-05-12 | |||
| JP2000252773A | 2000-09-14 | |||
| JPH08316760A | 1996-11-29 | |||
| US20160269008A1 | 2016-09-15 |
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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