在面临有源欺骗式干扰时,地面情报雷达通常采取副瓣匿影措施来抑制干扰。然而,实际使用过程中由于匿影天线全向性不足、阵地多径效应、干扰极化方式失配等多方面因素影响,匿影效果存在一定程度的下降。文中深入分析评估了上述各因素对雷达抗干扰性能的实际影响,并进行了针对性的优化改进。通过全向、全极化设计改进提升匿影天线性能,通过对匿影标记进行距离扩展,优化副瓣匿影处理流程。试验结果表明,改进后的副瓣匿影措施稳定有效,匿影天线全向性较好,可对抗不同极化干扰样式,并有效避免了多径效应带来的匿影损失。

Sidelobe blanking (SLB) technique is commonly used to suppress interference by ground-based intelligence radar while encountered with active deception jamming. However, the blanking effect is decreased to some extent due to various factors such as the insufficient omni-directivity of blanking antenna, the multipath effect as well as the mismatch of interference polarization, etc. In this paper, the impact of the above factors is thoroughly analyzed, and the corresponding optimization methods are proposed.The performance of the blanking antenna is improved through the omni-directivity and full polarization design, and the SLB process is optimized by the distance extension of SLB detection flag. The experimental result shows that the proposed SLB technique is robust and effective, the omni-directivity of the blanking antenna is better, the interference with different polarization can be suppressed,and the blanking loss caused by multipath effect can be effectively avoided as well.

TN820.1