首页|Improving millimeter-wave imaging quality using the vortex phase method

Improving millimeter-wave imaging quality using the vortex phase method

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This paper investigates a new vortex wave imaging approach to improve the imaging quality of small metal targets of size less than 1.5 mm.Antennas with different spiral phase plates are designed to efficiently transmit vortex beams with orbital angular momentums(OAMs).By analyzing the OAM spectrum of the target,it was discovered that the predominant reflection contains a particular OAM mode that carries abundant azimuthal information.This can be explained by the OAM selectivity of the target and the guidance of the vortex transmitting beam.A simple reflection vortex imaging system was designed to capture the phase information.Measurement results show that the high image contrast reaches 14.9％,which is twice as high as that of the imaging without OAM.Both of simulations and experiments demonstrate that the vortex phase imaging approach proposed in this paper can effectively improve the imaging quality at 80 GHz.This approach is suitable for other millimeter wave imaging systems and is helpful to improve the resolution in anti-terrorism security checks.

Orbital angular momentums(OAMs)beamsFocal plane imagingSpiral phase plates(SPPs)Vortex spectrum

Nairui Hu、Feng Qi、Yelong Wang、Zhaoyang Liu、Pengxiang Liu、Weifan Li

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Key Laboratory of Terahertz Imaging and Sensing,Shenyang 110169,China

Shenyang Aerospace University,Shenyang 110136,China

Key Laboratory of Opto-Electronic Information Processing,Chinese Academy of Sciences,Shenyang 110169,China

Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110169,China

Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,China

University of Chinese Academy of Sciences,Beijing 100049,China

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Science,Technology and Innovation Project of Xiongan New AreaLiaoNing Revitalization Talents ProgramShenyang Young and Middleaged Science and Technology Innovation Talent Support ProgramNatural Science Foundation of Liaoning Province of ChinaNatural Science Foundation of Liaoning Province of China

2022XAGG0181XLYC2007074RC2205232022-YGJC-032022-MS-034

2024

10.1016/j.dt.2024.04.020

防务技术
中国兵工学会

防务技术

CSTPCD
影响因子：0.358
ISSN：2214-9147
年,卷(期)：2024.39(9)