5G和卫星通信中无源互调电磁干扰研究

现代通信技术向着高密度、高集成、广域覆盖方向快速发展，无线接入终端数量大幅提升，微波器件固有寄 生的无源非线性导致的互调干扰严重制约了现代频谱资源的高效利用。文章从无源互调机理研究出发，梳理了国内外 无源互调机理研究中的经典问题以及最新进展，总结了近几十年来关于无源互调建模、检测、抑制与对消的研究成果， 并结合现代通信技术特点，指出多物理场、多调制模式、多信道重合条件下的 PIM 问题将成为研究热点。

With the modern communication technology moving toward high density, high integration, and widearea coverage, together with the substantial increasing of various wireless access terminals, the intermodulation interference by the inherent nonlinear characteristics from passive microwave circuits and devices is becoming the most thorniest issue to disturb the high efficiency utilization of spectrum resource. Starting from the passive intermodulation mechanism researches, this work sorts out the classical and newest progress in passive intermodulation research, and provides a comprehensive technical reference for PIM modeling, detection, and suppression in engineering applications in last decades. Finally, combining with the characteristics of wireless communication technologies in new generation, the future research trend of passive intermodulation under multi-physics, multi-modulation, overlapping channel condition is indicated.