摘要
抑制无源互调干扰是确保新一代移动通信系统安全、稳定和经济运行的重要前提,也是推进我国电信基础设施共建共享的重要保证,对无源互调干扰的产生机理进行分析是抑制其干扰产生的最根本性手段.本文综合性地阐述了金属松散电接触对无源互调干扰的影响机理,包括金属电接触表面的微观特征分析、松散电接触等效电路模型建立、松散电接触面电流密度和阻抗等电特征量对互调干扰作用机制等内容.理论建模、软件仿真以及实验测试表明:松散电接触导致增大的面电流密度与接触阻抗是产生无源互调干扰的直接原因.
Suppressing passive intermodulation distortion is an important precondition to ensure the safety,stability, and economic operation of the mobile communication systems. It is also an important guarantee for promoting the co-construction and sharing of telecom infrastructure. The most fundamental approach to suppress the distortion is the study of mechanisms of passive intermodulation. In this paper, the mechanism of loose electrical contact is studied. First, the microcosmic characteristic of the metal surface is analyzed. Then, the electrical parameters such as impedance, current density in the loose contact surface are analyzed. Finally,the simulation and measurement are conducted. We conclude that the additional impedance and increased current density, which are caused by the loose electrical contact, are the direct factors for generating the passive intermodulation distortion.
作者
杨会平
黄为
曾碧卿
温和
Huiping YANG;Wei HUANG;Biqing ZENG;He WEN(School of Software,South China Normal University,Foshan 528225,China;ESDEMC Technology LLC,Rolla 65401,USA;College of Electrical and Information Engineering,Hunan University,Changsha 410012,China)
出处
《中国科学：信息科学》
CSCD
北大核心
2021年第8期1316-1330,共15页
Scientia Sinica(Informationis)
基金
国家自然科学基金(批准号:61671203,61771190)资助项目。
关键词
无源互调干扰
松散电接触
同轴连接器
接触阻抗
新一代移动通信系统
passive intermodulation
loose contact
coaxial connectors
contact impedance
next-generation communication system
