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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.
The research on the target RCS mainly includes electromagnetic calculation and imaging-based measurement method, which is difficult to be widely applied in the terahertz band due to the limit of computer memory and running time.Reverse synthetic aperture radar imaging is often used in image-based measurement Backscattering algorithms (BP) are often used to reconstruct the target’s reflection map. Since the BP algorithm can not reflect significant angular flicker in the terahertz band in the image, the THz target RCS is measured using sub-aperture imaging , And the validity of the proposed algorithm is verified by simulation.