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研制了进动目标模型,构建了紧凑场微波暗室动态测量系统,通过暗室实验的方法研究了空间进动目标的动态散射特性,给出了若干典型条件下的全极化宽带测量结果。通过实验可以观察到目标进动引起的多普勒频移,证明了微波雷达对进动目标微多普勒的可观测性,同时观察到弹头常见结构引起的非理想点散射现象。实验结果的分析表明,该实验系统能够有效地揭示进动目标的目标特性和回波调制特性,从而为弹道中段目标的动态电磁散射特性、目标结构反演、运动参数提取和逆合成孔径雷达(ISAR)成像的研究奠定了基础,对于弹道中段目标识别的研究具有重要的意义。
The precession target model was developed and the dynamic measurement system of microwave anechoic chamber in compact field was constructed. The dynamic scattering characteristics of space precession target were studied by the method of darkroom experiment. The results of the measurement of full polarization in several typical conditions were given. The Doppler shift caused by the precession of the target can be observed experimentally, and the observability of microwave radar to the precession micro-Doppler is proved. The non-ideal point scattering caused by the common structure of the warhead is also observed. The experimental results show that the experimental system can effectively reveal the target characteristics and echo modulation characteristics of the precession target, and thus provide a theoretical basis for the dynamic electromagnetic scattering characteristics, target structure inversion, motion parameter extraction and inverse synthetic aperture radar ISAR) imaging research laid the foundation for the ballistic target recognition research is of great significance.