基于ISAR技术的太赫兹目标RCS测量

对目标RCS的研究主要包括电磁计算与基于成像的测量方法.由于受到计算机内存与运行时间的限制,电磁计算方法难以在太赫兹波段得到广泛应用.在基于图像的测量中常使用逆合成孔径雷达成像技术.后向散射算法(BP)常用于目标的反射图的重建.由于BP算法不能在图像中反映太赫兹波段目标显著的角闪烁现象,因此,使用子孔径成像技术对太赫兹目标RCS进行测量,并进行了仿真验证所提出算法的有效性.

Terahertz target radar cross-section measurement with ISAR technique

Researches of RCS include computational electromagnetics and image-based measurement. Restricted by computer memory and operating time, computational electromagnetic methods are difficult to be widely applied in terahertz band. Inverse Synthetic Aperture Radar (ISAR) imaging technique has been commonly utilized in image-based measurement. The reflectivity images are usually reconstructed by back-projection (BP) algorithm. However, the RCS angular glint is significant in terahertz band, which cannot be revealed in the BP images. Thus, the sub-aperture imaging technique was employed to measure the target RCS in terahertz band in this paper. Numerical simulations were adopted to test the validity of the proposed method.