A novel topology with controllable wideband baseband impedance for power amplifiers

作     者：Yao YAO Zhijiang DAI Mingyu LI Yao YAO;Zhijiang DAI;Mingyu LI

作者机构：School of Intelligent Technology and EngineeringChongqing University of Science and TechnologyChongqing400065China School of Microelectronics and Communication EngineeringChongqing UniversityChongqing400065China 

出 版 物：《Frontiers of Information Technology & Electronic Engineering》 (信息与电子工程前沿（英文版）)

年 卷 期：2024年第25卷第2期

页      面：308-315页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 080902[工学-电路与系统] 08[工学] 0835[工学-软件工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

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)。 

主　　题：Baseband impedance Concurrent dual-band Power amplifier 

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 is68.2%(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.