Beam Steering for Electromagnetic Vortex Imaging Using Uniform Circular Arrays

被引：60

作者：

Yuan, Tiezhu ^{[1
]}

Cheng, Yongqiang ^{[1
]}

Wang, Hongqiang ^{[1
]}

Qin, Yuliang ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sch Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2017年 / 16卷

基金：

中国国家自然科学基金;

关键词：

Directivity optimization; microwave staring imaging; orbital angular momentum (OAM); radio vortex; regularized least-squares (LS); uniform circular array (UCA); ORBITAL ANGULAR-MOMENTUM;

D O I：

10.1109/LAWP.2016.2600404

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The electromagnetic waves carrying orbital angular momentum can achieve azimuthal resolution for radar imaging without relative motion. However, the difference of main-lobe direction of different modes limits the echo energy. In this letter, the beam steering for vortex beams generated by a uniform circular array is performed by phased array technology. The main lobes of vortex beams carrying different modes can illuminate the target area with this method. The radiation field after beam steering is derived, and the phase distribution is thoroughly investigated. Then, the imaging model is established, and l(p) regularized least-squares algorithm is employed to reconstruct the two-dimensional target image. Simulation results demonstrate the effectiveness of the proposed beam steering method and that higher resolution can be achieved than Fourier transform method.

引用

页码：704 / 707

页数：4

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