Title:
DOHERTY AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2022/208879
Kind Code:
A1
Abstract:
A conventional Doherty amplifier has had a problem of poor linearity since transistors used for a carrier amplifier and a peak amplifier are driven at different operation classes. A Doherty amplifier according to the present disclosure is characterized by comprising: a distributor that distributes an inputted high-frequency signal into two branches; a carrier amplifier that has a first transistor and amplifies one of the distributed high-frequency signals; a peak amplifier that has a second transistor and amplifies the other one of the distributed high-frequency signals; and a synthesizer that synthesizes an output signal of the carrier amplifier and an output signal of the peak amplifier. The Doherty amplifier is characterized in that a gain of the second transistor is higher than the gain of the first transistor.
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Inventors:
FUKUDA ERI (JP)
HORIGUCHI KENICHI (JP)
HORIGUCHI KENICHI (JP)
Application Number:
PCT/JP2021/014367
Publication Date:
October 06, 2022
Filing Date:
April 02, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F1/02
Domestic Patent References:
| WO2016013047A1 | 2016-01-28 | |||
| WO2018197918A1 | 2018-11-01 |
Foreign References:
| JP2009194448A | 2009-08-27 | |||
| JP2012028880A | 2012-02-09 | |||
| JP2006333201A | 2006-12-07 | |||
| JP2009260658A | 2009-11-05 |
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
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