太赫兹逆合成孔径雷达成像中的次谐波抑制方法

Qi Liu, Qi Yang, Jingkun Gao, Ye Zhang, B. Deng, Hongqiang Wang
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引用次数: 0

摘要

逆合成孔径雷达(ISAR)是一种常用的遥感成像方法。此外,太赫兹(THz) ISAR由于其大带宽和短波长,可以有效地实现距离和方位角尺寸的高分辨率成像。然而,在实际的太赫兹isar成像场景中,由于器件老化或器件处理技术的缺陷,容易产生亚谐波。幅值项和相位项都存在亚谐波,导致ISAR成像质量下降。分析了330GHz ISAR成像实验中出现的次谐波特性,提出了利用两个反射镜的参考信号进行三次校正的方法来抑制次谐波。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Sub-harmonics Suppression Method in Terahertz Inverse Synthetic Aperture Radar Imaging
The inverse synthetic aperture radar (ISAR) is a commonly used method for remote sensing imaging. In addition, the terahertz (THz) ISAR is effective in realizing high-resolution imaging on both range and azimuth dimensions for its large bandwidth and short wavelength. However, in the real THz-ISAR imaging scene, the sub-harmonics easily occur because of the components ageing or the defects of the device-processing technology. The sub-harmonics embodied in both amplitude and phase terms lead to the deterioration of ISAR imaging quality. This paper analyses the property of the sub-harmonics appeared in the 330GHz ISAR imaging experiment and proposes a threefold correction method by reference signals of two reflectors to suppress the sub-harmonics.
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