移动通信微波部件无源互调干扰综述

Review of Passive Intermodulation interference of mobile communication microwave components

摘要:

在地面通信系统中，基站的微波部件长期暴露在外，受温度、湿度、污染等因素影响，原本洁净的部件表面受到氧化、沾污等，导致接触不良，产生无源互调(PIM)，干扰通信系统，导致地面移动通信中PIM的干扰不可避免。卫星通信系统中，由于通信距离远、平台限制等，必须采用收发共用模式，随着接收机灵敏度提升，对PIM指标要求更高；因系统高可靠性要求，PIM成为系统成败的关键问题之一。本文介绍了地面移动通信和星载微波部件PIM干扰的特点和研究进展，以期对PIM研究提供参考。

Abstract:

In ground communication systems, microwave components of the base station are exposed in air for a period of time, usually influenced by temperatures, humidity, pollution and other factors. The original clean surface of the components is oxidized and contaminated, leading to poor contact and Passive Intermodulation(PIM), which interferes with the communication system. Therefore, PIM is inevitable in ground mobile communication system. In the satellite communication system, due to the long communication distance and platform limitation, the common transceiver mode should be adopted. As the receiver sensitivity increases, the requirements on PIM indexes are more strict. PIM is one of the key problems for realizing the high reliability of system. The characteristics and research progress of PIM interference in ground mobile communication and satellite microwave components are introduced, which can provide a reference for PIM research.