Millimeter-Wave Imaging With Optimized Sparse Periodic Array for Short-Range Applications

被引:107
|
作者
Gumbmann, Frank [1 ]
Schmidt, Lorenz-Peter [1 ]
机构
[1] Univ Erlangen Nurnberg, Chair Microwave Engn & High Frequency Technol LHF, D-91058 Erlangen, Germany
来源
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2011年 / 49卷 / 10期
关键词
Millimeter-wave (mmW) radar; multiple-input-multiple-output (MIMO) systems; synthetic aperture radar (SAR);
D O I
10.1109/TGRS.2011.2164616
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
This paper presents a multiple-input-multiple-output imaging system on the basis of a hybrid concept with synthetic aperture radar and digital beam forming. By moving a multistatic linear array perpendicularly to the array dimension, a 2-D aperture is sampled. The scope of application is concealed weapon detection in conjunction with the imaging of humans and, alternatively, nondestructive testing (NDT). The frequency range of 75-90 GHz was chosen because of the inherent high lateral resolution. For NDT, it seems to be a good compromise between lateral resolution and penetration depth as well. A moderate number of transmit and receive channels are achieved by a sparse periodic array (SPA) design. Since this is a far-field approach, ambiguities are not well suppressed in the near-field point spread function of the sparse array. An extension of the SPA concept for short-range applications on the basis of an optimized array design and an optimized beamforming algorithm is presented in this paper.
引用
收藏
页码:3629 / 3638
页数:10
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