- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

Abstract

The one-dimensional (1D) range profile is an important back scattering characteristic of objective, which reveals the longitudinal distribution of radar cross section (RCS) along the detection beam. Since the shape and posture can be reflected by the 1D range profile, it is of great significance in military to determine the target orientation, velocity and whether it is armed. In this paper, broadband terahertz 1D-range-profile measurement system is built based on the time-domain spectroscopy (TDS) system. It is in bistatic configuration (bistatic angle of 9°) and the signal-to-noise ratio (SNR) is 34.5 dB, with a gold mirror used as a reflector. Benefiting from the ultrashort terahertz pulse width (full pulse width of 0.52 ps), the bandwidth covers the frequency range from 0.1 THz to 2.5 THz (peaked at 0.9 THz), corresponding to the range resolution on a submillimeter scale. Firstly, the 1D range profiles of several objects in different shapes are measured, including the step, cylinder, step cone and their combination, which indicates that the geometric profile of the target in the detection direction is adequate to identify the shape feature of the target and proves the reliability of the 1D range profile measuring system based on TDS. Secondly, aluminum plates with different surface roughness in a range of 0–25 μm are also characterized. The Kirchhoff approximation theory and small perturbation method (SPM) are introduced to illustrate the characteristics of broadband terahertz 1D range profile related to the surface roughness of target. It is found that the scattering characteristic of metal object in the terahertz range is sensitive to surface roughness. If the surface roughness of the object is larger, the peak intensity of the 1D range profile will be weaker and the echo signal pulse width becomes wider. The rule is also applicable for the cases with different incident angles. Furthermore, it is revealed that the time delay of the 1D range profile in the bistatic system is related to the rotation direction of the target, which is useful in estimating the posture of the target. In summary, the characteristics of 1D range profile for metal objects relating to shape, surface roughness and posture are studied. The conclusions have certain guiding significance for the target detection and recognition of terahertz radar.

Keywords:

Authors and contacts

Corresponding author:Zhong Kai,zhongkai@tju.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant No. 62175184) and the Open Fund of the Key Laboratory of Micro Opto-electro Mechanical System Technology, Ministry of Education (Grant No. 2022-04).

FullText HTML: translate this paragraph

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]

Cited By

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]

[1]	Liu Quancheng, Yang Fu, Zhang Qi, Duan Yongwei, Deng Hu, Shang Liping.Reasch on the Vibrational Features of CL-20/MTNP Cocrystal Using Terahertz Spectroscopy. Acta Physica Sinica, 2024, 0(0): .doi:10.7498/aps.73.20240944
[2]	Feng Long-Cheng, Du Chen, Yang Sheng-Xin, Zhang Cai-Hong, Wu Jing-Bo, Fan Ke-Bin, Jin Biao-Bing, Chen Jian, Wu Pei-Heng.Research on terahertz real-time near-field spectral imaging. Acta Physica Sinica, 2022, 71(16): 164201.doi:10.7498/aps.71.20220131
[3]	Yan Zhi-Jin, Shi Wei.Radiation characteristics of terahertz GaAs photoconductive antenna arrays. Acta Physica Sinica, 2021, 70(24): 248704.doi:10.7498/aps.70.20211210
[4]	Hou Lei, Wang Jun-Nan, Wang Lei, Shi Wei.Experimental study and simulation analysis of terahertz absorption spectra ofα-lactose aqueous solution. Acta Physica Sinica, 2021, 70(24): 243202.doi:10.7498/aps.70.20211716
[5]	Jiang Wei, Zhao Huan, Wang Guo-Cui, Wang Xin-Ke, Han Peng, Sun Wen-Feng, Ye Jia-Sheng, Feng Sheng-Fei, Zhang Yan.Birefringence characteristics of magnesium oxide crystal in terahertz frequency region by using terahertz focal plane imaging. Acta Physica Sinica, 2020, 69(20): 208702.doi:10.7498/aps.69.20200766
[6]	Zhang Xu-Tao, Que Xiao-Feng, Cai He, Sun Jin-Hai, Zhang Jing, Li Liang-Sheng, Liu Yong-Qiang.Simulations and time-domain spectroscopy measurements for terahertz radar-cross section. Acta Physica Sinica, 2019, 68(16): 168701.doi:10.7498/aps.68.20190552
[7]	Zhang Hui-Yun, Liu Meng, Yin Yi-Heng, Wu Zhi-Xin, Shen Duan-Long, Zhang Yu-Ping.Study on scattering properties of the metal wire gating in a THz band based on Green function method. Acta Physica Sinica, 2013, 62(19): 194207.doi:10.7498/aps.62.194207
[8]	Dong Hai-Ming.Electrically-controlled nonlinear terahertz optical properties of graphene. Acta Physica Sinica, 2013, 62(23): 237804.doi:10.7498/aps.62.237804
[9]	Lu Xiao-Ke, Guo Mao-Tian, Su Jian-Po, Gong Qiao-Xia, Wu Jin-Ke, Liu Jian-Li, Chen Ming, Ma Feng-Ying.Optical properties of terahertz dielectric microcavity. Acta Physica Sinica, 2013, 62(8): 084208.doi:10.7498/aps.62.084208
[10]	Ma Feng-Ying, Chen Ming, Liu Xiao-Li, Liu Jian-Li, Chi Quan, Du Yan-Li, Guo Mao-Tian, Yuan Bin.Design and characterization of a terahertz microcavity structure. Acta Physica Sinica, 2012, 61(11): 114205.doi:10.7498/aps.61.114205
[11]	Zhao Yu-Tian, Zhang Qiang, Bai Jing, Fu Shu-Fang, Zhou Sheng.Terahertz wave propagation of one-dimensional antiferromagnetic/dielectric qusi-periodic photonic crystals. Acta Physica Sinica, 2011, 60(7): 077503.doi:10.7498/aps.60.077503
[12]	Zhang Rong, Cao Jun-Cheng.Research on modulation property of photonic crystals in terahertz range. Acta Physica Sinica, 2010, 59(6): 3924-3929.doi:10.7498/aps.59.3924
[13]	Liu Wen-Jun, Mao Hong-Yan, Fu Guo-Qing, Qu Shi-Liang.Temporal statistics of multiply scattered terahertz pulses in scattering medium. Acta Physica Sinica, 2010, 59(2): 913-917.doi:10.7498/aps.59.913
[14]	Li Yan-Hui, Wu Zhen-Sen, Gong Yan-Jun, Zhang Geng, Wang Ming-Jun.Laser one-dimensional range profile. Acta Physica Sinica, 2010, 59(10): 6988-6993.doi:10.7498/aps.59.6988
[15]	Wang Wei-Ning.Terahertz and Raman spectra of L-threonine. Acta Physica Sinica, 2009, 58(11): 7640-7645.doi:10.7498/aps.58.7640
[16]	Meng Kuo, Wang Yan-Hua, Chen Long-Wang, Zhang Yan.Resonant transmission of the terahertz pulse through a subwavelength metallic slit. Acta Physica Sinica, 2008, 57(5): 3198-3202.doi:10.7498/aps.57.3198
[17]	Jia Wan-Li, Shi Wei, Ji Wei-Li, Ma De-Ming.Study of the dipole characteristic of terahertz wave emitted from photoconductor switches. Acta Physica Sinica, 2007, 56(7): 3845-3850.doi:10.7498/aps.56.3845
[18]	Wang Wei-Ning, Li Yuan-Bo, Yue Wei-Wei.Vibrational spectrum of histidine and arginine in THz range. Acta Physica Sinica, 2007, 56(2): 781-785.doi:10.7498/aps.56.781
[19]	Ma Shi-Hua, Shi Yu-Lei, Xu Xin-Long, Yan Wei, Yang Yu-Ping, Wang Li.Low-frequency collective vibrational modes of asparagine by terahertz time-domain spectroscopy. Acta Physica Sinica, 2006, 55(8): 4091-4095.doi:10.7498/aps.55.4091
[20]	Yue Wei-Wei, Wang Wei-Ning, Zhao Guo-Zhong, Zhang Cun-Lin, Yan Hai-Tao.THz spectrum of aromatic amino acid. Acta Physica Sinica, 2005, 54(7): 3094-3099.doi:10.7498/aps.54.3094

Catalog

Vol. 72, Issue 18 - 2023-09-20

Metrics

Abstract views:2931
PDF Downloads:48
Cited By:0

Search

Article