公开(公告)号：US20230246597A1

公开(公告)日：2023-08-03

申请号：US18132426

申请日：2023-04-10

Applicant: LANSUS TECHNOLOGIES INC.

Inventor： LIYUAN CAI ,  KAI XUAN ,  JIASHUAI GUO

IPC: H03F1/02 ,  H03F3/24 ,  H03F1/42

CPC classification number: H03F1/0288 ,  H03F1/42 ,  H03F3/245 ,  H03F2200/36 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/451

Abstract: A broadband Doherty power amplifier is provided, which includes a power divider, a carrier power amplifier circuit, a peak power amplifier circuit, and a load modulation network. The carrier power amplifier circuit includes a carrier input matching circuit, a carrier power amplifier, and a carrier output matching circuit. The peak power amplifier circuit includes a peak input matching circuit, a peak power amplifier and a peak output matching circuit. A resistance value of a system load is ZL. An output impedance of the carrier output matching circuit is Zm and meets Zm=ZL(n+ 1). An output impedance of the peak output matching circuit is Zp and meets Zp ZL(n+1)/n. The load modulation network is configured to set an impedance of a combination point to be ZQ, whose resistance value is ZL. A method of implementing a broadband Doherty power amplifier is further provided.