甘琳,李健兵,杨坤龙,等. 运动调制的间断型长箔条散射特性研究[J]. 电波科学学报,2023,38(1):114-122. DOI: 10.12265/j.cjors.2022005
      引用本文: 甘琳,李健兵,杨坤龙,等. 运动调制的间断型长箔条散射特性研究[J]. 电波科学学报,2023,38(1):114-122. DOI: 10.12265/j.cjors.2022005
      GAN L, LI J B, YANG K L, et al. Research on the motion and scattering characteristics of intermittent long chaff[J]. Chinese journal of radio science,2023,38(1):114-122. (in Chinese). DOI: 10.12265/j.cjors.2022005
      Citation: GAN L, LI J B, YANG K L, et al. Research on the motion and scattering characteristics of intermittent long chaff[J]. Chinese journal of radio science,2023,38(1):114-122. (in Chinese). DOI: 10.12265/j.cjors.2022005

      运动调制的间断型长箔条散射特性研究

      Research on the motion and scattering characteristics of intermittent long chaff

      • 摘要: 随着高分辨、分布式、组网融合的雷达系统的发展,传统箔条面临着干扰效率不足、三维维形困难等问题. 针对发展低维高效的箔条干扰方式的需求,提出了一种由传统箔条串接而成的间断型长箔条,并通过模态分析和数值仿真研究了其在稀薄大气中的运动学特性和散射特性. 该类箔条由考虑了缩短效应的多根传统箔条间隔一定距离依次相连形成,旨在通过约束传统箔条在稀薄大气中的自由扩散,维持雷达距离单元内较高的箔条密度,从而提高干扰效率. 仿真结果表明:在不同指向条件下,单根7.44 m间断型长箔条两分钟内的雷达散射截面(radar cross section, RCS)均未出现下降趋势,仅在均值附近上下波动;单根7.44 m间断型长箔条在X波段各频点的平均RCS较同质量的传统箔条均有所提升,10 GHz条件下至少提升了3 dB;100根随机分布的7.44 m间断型长箔条形成的箔条云RCS均值约为−9 dBsm,较相同条件下传统箔条形成的箔条云提升了6~7 dB. 新型间断型长箔条可为典型小RCS目标的高效费比防护提供支撑.

         

        Abstract: With the development of high-resolution, distributed, and network-integrated radar systems, the traditional chaff is facing problems such as insufficient interference efficiency and difficulty in maintaining three-dimensional shape. In order to develop a new low-dimensional and efficient chaff jamming method, an intermittent long chaff is proposed, which is composed of traditional chaffs in series. Its motion and scattering characteristics in the thin atmosphere are studied by modal analysis and numerical simulation. This type of chaff is formed by connecting several traditional chaffs at a certain distance in consideration of shortening effect. It aims to maintain a high chaff density in the distance cell by restricting the free diffusion of the traditional chaffs on it in the thin atmosphere, thereby improving the radar interference efficiency. Simulation results show that the radar cross section (RCS) of a single 7.44 m intermittent long chaff within two minutes does not show a downward trend under different pointing conditions, and only fluctuates around the average value. The average RCS of a single 7.44 m intermittent long chaff at frequency points in the X-band is improved compared with traditional chaffs of the same quality, and at least 3 dB higher at 10 GHz. The average RCS of the chaff cloud formed by 100 randomly distributed intermittent chaff is about −9 dBSm, which is 6−7 dB higher than that of the chaff cloud formed by traditional chaffs under the same conditions. The new intermittent long chaff can provide support for the efficient cost-effective protection of typical small RCS targets.

         

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