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Chin. Phys. B, 2017, Vol. 26(5): 057701    DOI: 10.1088/1674-1056/26/5/057701
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Single-layer broadband planar antenna using ultrathin high-efficiency focusing metasurfaces

Hai-Sheng Hou(侯海生), Guang-Ming Wang(王光明), Hai-Peng Li(李海鹏), Wen-Long Guo(郭文龙), Tang-jing Li(李唐景), Tong Cai(蔡通)
Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China
Abstract  Phase gradient metasurfaces (PGMS) offer a fascinating ability to control the amplitude and phase of the electromagnetic (EM) waves on a subwavelength scale, resulting in new applications of designing novel microwave devices with improved performances. In this paper, a reflective symmetrical element, consisting of orthogonally I-shaped structures, has been demonstrated with an approximately parallel phase response from 15 GHz to 22 GHz, which results in an interesting wideband property. For practical design, a planar antenna is implemented by a well-optimized focusing metasurface and excited by a self-designed Vivaldi antenna at the focus. Numerical and experimental results coincide well. The planar antenna has a series of merits such as a wide 3-dB gain bandwidth of 15-22 GHz, an average gain enhancement of 16 dB, a comparable aperture efficiency of better than 45% at 18 GHz, and also a simple fabrication process. The proposed reflective metasurface opens up a new avenue to design wideband microwave devices.
Keywords:  phase gradient metasurfaces      ultrathin      broadband      focusing  
Received:  09 October 2016      Revised:  07 December 2016      Accepted manuscript online: 
PACS:  77.22.-d (Dielectric properties of solids and liquids)  
  73.61.-r (Electrical properties of specific thin films)  
  84.90.+a (Other topics in electronics, radiowave and microwave technology, and direct energy conversion and storage)  
  77.22.-d (Dielectric properties of solids and liquids)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61372034).
Corresponding Authors:  Guang-Ming Wang, Tong Cai     E-mail:  wgming01@sina.com;caitong326@sina.cn

Cite this article: 

Hai-Sheng Hou(侯海生), Guang-Ming Wang(王光明), Hai-Peng Li(李海鹏), Wen-Long Guo(郭文龙), Tang-jing Li(李唐景), Tong Cai(蔡通) Single-layer broadband planar antenna using ultrathin high-efficiency focusing metasurfaces 2017 Chin. Phys. B 26 057701

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