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高功率、大强度电磁波照射,是飞机在电子对抗中实施电磁干扰的重要手段。在实验室通过电流钳对线缆进行电流注入,从而达到模拟飞机系统间电磁干扰试验的目的。如何从理论上分析照射场在电缆上所感应的电流,是飞机系统间抗扰度实验的重要环节。文章利用有源传输线理论,建立了线缆-大地耦合模型,给出了线缆电流分布与大地电导率、地-线缆高度、线缆长度、线缆两端阻抗以及照射场的频率、幅度等多参数的关系;同时还进行了实测验证。结果表明,理论分析与实测结果基本一致,这为飞机系统间电磁干扰试验的实施提供了必要的理论和数据基础。
High-power, high-intensity electromagnetic radiation is an important means of aircraft electromagnetic interference in electronic warfare. In the laboratory through the current clamp on the cable current injection, so as to achieve simulation aircraft system electromagnetic interference test purposes. How to theoretically analyze the current induced by the radiation field on the cable is an important part of the immunity test between aircraft systems. In this paper, the theory of active transmission line is used to establish the cable-ground coupling model. The current distribution and earth conductivity, ground-cable height, cable length, impedance at both ends of the cable and the frequency and amplitude And other multi-parameter relationship; also conducted a measured test. The results show that the theoretical analysis and the measured results are basically the same, which provides the necessary theoretical and data basis for the implementation of the electromagnetic interference test between aircraft systems.