Title:
DOHERTY AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2021/245891
Kind Code:
A1
Abstract:
This Doherty amplifier is configured to include: a first amplifier (9) which amplifies a first signal as an auxiliary amplifier if the frequencies of the first signal and a second signal are each a first frequency, and amplifies the first signal as a main amplifier if the frequencies are each a second frequency; a second amplifier (10) which amplifies the second signal as the main amplifier if the frequencies are each the first frequency, and amplifies the second signal as the auxiliary amplifier if the frequencies are each the second frequency; and a combining circuit (11) which combines the first signal after amplification by the first amplifier (9) and the second signal after amplification by the second amplifier (10). Further, the second amplifier (10) has a greater saturated output power than the first amplifier (9), and when the first amplifier (9) amplifies the first signal as the main amplifier and the second amplifier (10) amplifies the second signal as the auxiliary amplifier, the combining circuit (11) modifies the output impedance of the first amplifier (9) such that the imaginary component of the output impedance of the first amplifier (9) decreases.
Inventors:
KOMATSUZAKI YUJI (JP)
SAKATA SHUICHI (JP)
SHINJO SHINTARO (JP)
OTSUKA HIROSHI (JP)
SAKATA SHUICHI (JP)
SHINJO SHINTARO (JP)
OTSUKA HIROSHI (JP)
Application Number:
PCT/JP2020/022180
Publication Date:
December 09, 2021
Filing Date:
June 04, 2020
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F1/02; H03F3/24; H03F3/68
Domestic Patent References:
| WO2019097609A1 | 2019-05-23 | |||
| WO2008107990A1 | 2008-09-12 | |||
| WO2017199366A1 | 2017-11-23 |
Foreign References:
| JP2013115760A | 2013-06-10 | |||
| JP2013115760A | 2013-06-10 |
Other References:
See also references of EP 4142150A4
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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