A novel topology with controllable wideband baseband impedance for power amplifiers  

作　　者：Yao YAO Zhijiang DAI Mingyu LI 

机构地区：[1]School of Intelligent Technology and Engineering,Chongqing University of Science and Technology,Chongqing,400065,China [2]School of Microelectronics and Communication Engineering,Chongqing University,Chongqing,400065,China

出　　处：《Frontiers of Information Technology & Electronic Engineering》2024年第2期308-315,共8页信息与电子工程前沿（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.62001061);the Science and Technology Research Program of Chongqing Municipal Education Commission,China(No.KJQN202201525);the Natural Science Foundation of Chongqing,China(No.CSTB2022NSCQ-MSX0453);the Research Foundation of Chongqing University of Science and Technology,China(No.CKRC2020029)。

摘　　要：This paper presents a novel topology to control the baseband impedance of a power amplifier(PA)to avoid performance deterioration in concurrent dual-band mode.This topology can avoid pure resonance of capacitors and inductors LC,which leads to a high impedance at some frequency points.Consequently,it can be applied to transmitters that are excited by broadband signals.In particular,by adjusting the circuit parameters and increasing stages,the impedance of the key frequency bands can be flexibly controlled.A PA is designed to support this design idea.Its saturated output power is around 46.7 dBm,and the drain efficiency is>68.2%(1.8-2.3 GHz).Under concurrent two-tone excitation,the drain efficiency reaches around 40%even under 5.5 dB back-off power with the tone spacing from 10 MHz to 500 MHz.These results demonstrate that the proposed topology is capable of controlling wideband baseband impedance.

关 键 词：Baseband impedance Concurrent dual-band Power amplifier 

分 类 号：TN722[电子电信—电路与系统]