甚高频无线通信系统发射机互调干扰研究

在甚高频（VHF）无线通信系统中,发射机互调干扰已成为一个影响通信质量和通信安全的重要因素。互调干扰不仅污染了周边电磁环境,还会干扰正常通信,降低通信质量。文中研究了互调干扰的形成与危害;分析了互调干扰的测试方法;并利用搭建的互调干扰测试系统对甚高频无线发射机互调干扰进行了测试与分析;讨论了降低和消除互调干扰的措施。研究成果对于提高甚高频通信系统的抗干扰能力,实现甚高频无线通信设备科学合理的频谱规划,提高系统间电磁兼容具有重要的应用价值。

Study on Transmitter Intermodulation Interference for VHF Radio Communication Systems

In very high frequency （VHF） radio communication systems, the transmitter intermodulation interference has become an important factor affecting the quality and safety of communications. Intermodulation interference not only pollutes the electromagnetic environment, but also interferes with the normal communications. This paper studies the formation mechanism and harm of VHF transmitter intermodulation interference, and analyzes the test method and test results, then the suppression measures for transmitter intermodulation interference are proposed, which have the important application value in improving antiinterference ability of VHF communication systems and achieving reasonable spectrum layout and electro magnetic compatibility.