强激光与粒子束, 2012, 24 (1): 7, 网络出版: 2012-02-14   

太赫兹极高分辨力雷达成像试验研究

Experimental research on high resolution terahertz radar imaging
作者单位
1 中国工程物理研究院 电子工程研究所, 四川 绵阳 621900
2 中国工程物理研究院, 四川 绵阳 621900
摘要
给出了一种载频0.14 THz、带宽5 GHz的极高分辨力太赫兹雷达成像系统样机。系统采用Ka波段毫米波信号二倍频后作为样机收发链路的谐波混频本振, 以线性调频连续波信号作为发射信号, 接收时采用去斜接收。利用该太赫兹雷达进行了成像试验并得到了1维距离像与逆合成孔径雷达(ISAR)成像结果。结果表明, THz雷达样机实现了3 cm的高分辨力, 其ISAR像清晰, 反映了目标的细微特征。
Abstract
The design and realization of a terahertz(THz) radar system with 0.14 THz carrier frequency and 5 GHz bandwidth have been presented. The Ka band signal was frequency-doubled to be used as the local oscillator signal for sub-harmonic mixer in the system’s transceiver chain. For the transmitted signal was a linearly frequency-modulated continuous-wave(LFM-CW), the dechirp technique was used in the THz radar receiver front end. By using this THz radar system, 3 cm high resolution range profiles were obtained as well as inverse synthetic aperture radar(ISAR) images, which exactly represent the subtle features of targets.
参考文献

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蔡英武, 杨陈, 曾耿华, 黄祥, 王成, 江舸, 李如忠, 陶荣辉, 张健, 周传明, 姚军. 太赫兹极高分辨力雷达成像试验研究[J]. 强激光与粒子束, 2012, 24(1): 7. Cai Yingwu, Yang Chen, Zeng Genghua, Huang Xiang, Wang Cheng, Jiang Ge, Li Ruzhong, Tao Ronghui, Zhang Jian, Zhou Chuanming, Yao Jun. Experimental research on high resolution terahertz radar imaging[J]. High Power Laser and Particle Beams, 2012, 24(1): 7.

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