Title:
DOHERTY AMPLIFIER AND COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/117222
Kind Code:
A1
Abstract:
This Doherty amplifier (10) is configured such that: when both of a carrier amplifier (18) and a peak amplifier (19) are to be saturated, the ratio Z3/Z2 of the characteristic impedance Z3 of a second transmission line (13) to the characteristic impedance Z2 of a first transmission line (12) is equal to the power distribution ratio P2/P3 of a signal to be amplified between the carrier amplifier (18) and the peak amplifier (19); and the resistance value Riso of a resistor (14) is equal to a value obtained by multiplying, by a proportionality coefficient w which is not less than 0 but less than 1, the sum of an input impedance Zcin0 of the carrier amplifier (18) when said carrier amplifier (18) reaches saturation and an input impedance Zpin0 of the peak amplifier (19) when said peak amplifier (19) reaches saturation.
Inventors:
SAKATA SHUICHI (JP)
KOMATSUZAKI YUJI (JP)
SHINJO SHINTARO (JP)
KOMATSUZAKI YUJI (JP)
SHINJO SHINTARO (JP)
Application Number:
PCT/JP2019/048944
Publication Date:
June 17, 2021
Filing Date:
December 13, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F1/02; H03F1/07; H03F3/68
Foreign References:
| JP2006339981A | 2006-12-14 | |||
| JPS55132104A | 1980-10-14 | |||
| JP2011211679A | 2011-10-20 | |||
| JP2018186370A | 2018-11-22 | |||
| JPH09321509A | 1997-12-12 | |||
| JPH07263981A | 1995-10-13 | |||
| JP2017534228A | 2017-11-16 | |||
| JP2008125044A | 2008-05-29 |
Other References:
See also references of EP 4064557A4
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
Download PDF: