中国物理B ›› 2017, Vol. 26 ›› Issue (5): 57701-057701.doi: 10.1088/1674-1056/26/5/057701

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

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)   

  1. Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China
  • 收稿日期:2016-10-09 修回日期:2016-12-07 出版日期:2017-05-05 发布日期:2017-05-05
  • 通讯作者: Guang-Ming Wang, Tong Cai E-mail:wgming01@sina.com;caitong326@sina.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61372034).

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)   

  1. Air and Missile Defense College, Air Force Engineering University, Xi'an 710051, China
  • Received:2016-10-09 Revised:2016-12-07 Online:2017-05-05 Published:2017-05-05
  • Contact: Guang-Ming Wang, Tong Cai E-mail:wgming01@sina.com;caitong326@sina.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61372034).

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摘要： 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.

关键词: phase gradient metasurfaces, ultrathin, broadband, focusing

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.

Key words: phase gradient metasurfaces, ultrathin, broadband, focusing

中图分类号:  (Dielectric properties of solids and liquids)

  • 77.22.-d
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)