应用于太赫兹成像的弧形多收多发阵列的设计方法
|
摘要
提出了基于等效阵列概念的弧形多收多发(MIMO)阵列的设计方法,依照该方法设计了一种50发60收的弧形MIMO阵列,并在太赫兹波段进行仿真分析。结果表明,所设计的弧形MIMO阵列的成像分辨率接近于理论极限;该弧形MIMO阵列与包含3000个收发同置天线的等效阵列相比,点扩展函数的主瓣宽度一致、旁瓣波峰波谷的位置一一对应,其等效性得到了验证;与传统直线MIMO阵列相比,弧形MIMO阵列的成像范围较大,其旁栅伪影得到明显抑制,这有利于获得更好的曲面目标侧面成像效果。
In this study, we propose a design method to develop an arc multiple-input multiple-output(MIMO) antenna array based on the equivalent array concept. Further, an arc MIMO antenna array containing 50 transmitters and 60 receivers is designed. The simulation experiment and analysis conducted in the terahertz band denote that the imaging resolution of the arc MIMO array is almost equal to the theoretical limit. When compared with an equivalent array containing 3000 transmitters, the main-lobe widths of both the point spread functions are observed to be almost identical, and the positions of the side lobe peaks and valleys correspond accordingly. Subsequently, the equivalence between the arc MIMO array and the equivalent array can be verified based on the simulation results. When compared with the traditional linear MIMO array, the arc MIMO array exhibits a larger imaging range, and its side gating artifacts are almost completely reduced. These factors are important to obtain better imaging results with respect to the side view of the curved surface imaging targets.
In this study, we propose a design method to develop an arc multiple-input multiple-output(MIMO) antenna array based on the equivalent array concept. Further, an arc MIMO antenna array containing 50 transmitters and 60 receivers is designed. The simulation experiment and analysis conducted in the terahertz band denote that the imaging resolution of the arc MIMO array is almost equal to the theoretical limit. When compared with an equivalent array containing 3000 transmitters, the main-lobe widths of both the point spread functions are observed to be almost identical, and the positions of the side lobe peaks and valleys correspond accordingly. Subsequently, the equivalence between the arc MIMO array and the equivalent array can be verified based on the simulation results. When compared with the traditional linear MIMO array, the arc MIMO array exhibits a larger imaging range, and its side gating artifacts are almost completely reduced. These factors are important to obtain better imaging results with respect to the side view of the curved surface imaging targets.
引文
[1] Zhang J S,Zhu W W,Zhao Y J,et al.Passive THz imaging system based on the crank-rocker mechanism[J].Acta Optica Sinica,2013,33(12):1211006.张镜水,朱维文,赵跃进,等.基于曲柄摇杆机构的被动太赫兹波成像系统[J].光学学报,2013,33(12):1211006.
[2] Yan Y Q,Zhao C Q,Xu W D,et al.Research on the terahertz active ghost imaging technology[J].Chinese Journal of Lasers,2018,45(8):0814001.闫昱琪,赵成强,徐文东,等.太赫兹主动关联成像技术研究[J].中国激光,2018,45(8):0814001.
[3] Li W J,Wang T Y,Zhou Y,et al.Terahertz non-destructive inspection of air defect within adhesive layers of multi-layer bonded structure[J].Acta Optica Sinica,2017,37(1):0111002.李文军,王天一,周宇,等.多层胶接结构胶层空气缺陷的太赫兹无损检测[J].光学学报,2017,37(1):0111002.
[4] Gumbmann F,Schmidt L P.Millimeter-wave imaging with optimized sparse periodic array for short-range applications[J].IEEE Transactions on Geoscience and Remote Sensing,2011,49(10):3629-3638.
[5] Su Y,Zhu Y T,Yu W X,et al.Design theory and algorithm of multi-channel radar antenna array [J].Scientia Sinica(Informationis),2010,40(10):1372-1383.粟毅,朱宇涛,郁文贤,等.多通道雷达天线阵列的设计理论与算法[J].中国科学:信息科学,2010,40(10):1372-1383.
[6] Zhuge X D,Yarovoy A G.Sparse multiple-input multiple-output arrays for high-resolution near-field ultra-wideband imaging[J].IET Microwaves,Antennas & Propagation,2011,5(13):1552-1562.
[7] Zhuge X D,Yarovoy A G.Study on two-dimensional sparse MIMO UWB arrays for high resolution near-field imaging[J].IEEE Transactions on Antennas and Propagation,2012,60(9):4173-4182.
[8] Ge T Y,Jing W,Zhao L,et al.Sparse array in near-field millimeter-wave multiple-input multiple-output radar imaging system[J].High Power Laser and Particle Beams,2016,28(11):113101.葛桐羽,经文,赵磊,等.毫米波多输入多输出雷达稀疏阵列近场成像[J].强激光与粒子束,2016,28(11):113101.
[9] Tan K,Wu S Y,Wang Y C,et al.A novel two-dimensional sparse MIMO array topology for UWB short-range imaging[J].IEEE Antennas and Wireless Propagation Letters,2016,15:702-705.
[10] Tan K,Wu S Y,Wang Y C,et al.On sparse MIMO planar array topology optimization for UWB near-field high-resolution imaging[J].IEEE Transactions on Antennas and Propagation,2017,65(2):989-994.
[11] Ahmed S S,Schiessl A,Schmidt L P.A novel fully electronic active real-time imager based on a planar multistatic sparse array[J].IEEE Transactions on Microwave Theory and Techniques,2011,59(12):3567-3576.
[12] Ahmed S S,Schiessl A,Gumbmann F,et al.Advanced microwave imaging[J].IEEE Microwave Magazine,2012,13(6):26-43.
[13] Sheen D M,McMakin D L,Hall T E.Cylindrical millimeter-wave imaging technique and applications[J].Proceedings of SPIE,2006,6211:62110A.
[14] Qiao L B,Wang Y X,Zhao Z R,et al.Exact reconstruction for near-field three-dimensional planar millimeter-wave holographic imaging[J].Journal of Infrared,Millimeter,and Terahertz Waves,2015,36(12):1221-1236.
[15] Sheen D M,McMakin D L,Hall T E.Three-dimensional millimeter-wave imaging for concealed weapon detection[J].IEEE Transactions on Microwave Theory and Techniques,2001,49(9):1581-1592.
[2] Yan Y Q,Zhao C Q,Xu W D,et al.Research on the terahertz active ghost imaging technology[J].Chinese Journal of Lasers,2018,45(8):0814001.闫昱琪,赵成强,徐文东,等.太赫兹主动关联成像技术研究[J].中国激光,2018,45(8):0814001.
[3] Li W J,Wang T Y,Zhou Y,et al.Terahertz non-destructive inspection of air defect within adhesive layers of multi-layer bonded structure[J].Acta Optica Sinica,2017,37(1):0111002.李文军,王天一,周宇,等.多层胶接结构胶层空气缺陷的太赫兹无损检测[J].光学学报,2017,37(1):0111002.
[4] Gumbmann F,Schmidt L P.Millimeter-wave imaging with optimized sparse periodic array for short-range applications[J].IEEE Transactions on Geoscience and Remote Sensing,2011,49(10):3629-3638.
[5] Su Y,Zhu Y T,Yu W X,et al.Design theory and algorithm of multi-channel radar antenna array [J].Scientia Sinica(Informationis),2010,40(10):1372-1383.粟毅,朱宇涛,郁文贤,等.多通道雷达天线阵列的设计理论与算法[J].中国科学:信息科学,2010,40(10):1372-1383.
[6] Zhuge X D,Yarovoy A G.Sparse multiple-input multiple-output arrays for high-resolution near-field ultra-wideband imaging[J].IET Microwaves,Antennas & Propagation,2011,5(13):1552-1562.
[7] Zhuge X D,Yarovoy A G.Study on two-dimensional sparse MIMO UWB arrays for high resolution near-field imaging[J].IEEE Transactions on Antennas and Propagation,2012,60(9):4173-4182.
[8] Ge T Y,Jing W,Zhao L,et al.Sparse array in near-field millimeter-wave multiple-input multiple-output radar imaging system[J].High Power Laser and Particle Beams,2016,28(11):113101.葛桐羽,经文,赵磊,等.毫米波多输入多输出雷达稀疏阵列近场成像[J].强激光与粒子束,2016,28(11):113101.
[9] Tan K,Wu S Y,Wang Y C,et al.A novel two-dimensional sparse MIMO array topology for UWB short-range imaging[J].IEEE Antennas and Wireless Propagation Letters,2016,15:702-705.
[10] Tan K,Wu S Y,Wang Y C,et al.On sparse MIMO planar array topology optimization for UWB near-field high-resolution imaging[J].IEEE Transactions on Antennas and Propagation,2017,65(2):989-994.
[11] Ahmed S S,Schiessl A,Schmidt L P.A novel fully electronic active real-time imager based on a planar multistatic sparse array[J].IEEE Transactions on Microwave Theory and Techniques,2011,59(12):3567-3576.
[12] Ahmed S S,Schiessl A,Gumbmann F,et al.Advanced microwave imaging[J].IEEE Microwave Magazine,2012,13(6):26-43.
[13] Sheen D M,McMakin D L,Hall T E.Cylindrical millimeter-wave imaging technique and applications[J].Proceedings of SPIE,2006,6211:62110A.
[14] Qiao L B,Wang Y X,Zhao Z R,et al.Exact reconstruction for near-field three-dimensional planar millimeter-wave holographic imaging[J].Journal of Infrared,Millimeter,and Terahertz Waves,2015,36(12):1221-1236.
[15] Sheen D M,McMakin D L,Hall T E.Three-dimensional millimeter-wave imaging for concealed weapon detection[J].IEEE Transactions on Microwave Theory and Techniques,2001,49(9):1581-1592.