中国物理B ›› 2018, Vol. 27 ›› Issue (8): 87802-087802.doi: 10.1088/1674-1056/27/8/087802

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

High-performance lens antenna using high refractive index metamaterials

Lai-Jun Wang(王来军), Qiao-Hong Chen(陈巧红), Fa-Long Yu(余发龙), Xi Gao(高喜)   

  1. 1 School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China;
    2 Guangxi Key Laboratory of Wireless Wideband Communication & Signal Processing, Guilin 541004, China
  • 收稿日期:2017-12-12 修回日期:2018-05-04 出版日期:2018-08-05 发布日期:2018-08-05
  • 通讯作者: Xi Gao E-mail:gao_xi76@163.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61761010 and 61461016), in part by the Natural Science Foundation of Guangxi Zhuang Autonomous Region, China (Grant No. 2015jjBB7002), in part by the Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, and in part by the Innovation Project of GUET Graduate Education (Grant No. 2018JCX24).

High-performance lens antenna using high refractive index metamaterials

Lai-Jun Wang(王来军)1, Qiao-Hong Chen(陈巧红)1, Fa-Long Yu(余发龙)1, Xi Gao(高喜)1,2   

  1. 1 School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China;
    2 Guangxi Key Laboratory of Wireless Wideband Communication & Signal Processing, Guilin 541004, China
  • Received:2017-12-12 Revised:2018-05-04 Online:2018-08-05 Published:2018-08-05
  • Contact: Xi Gao E-mail:gao_xi76@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61761010 and 61461016), in part by the Natural Science Foundation of Guangxi Zhuang Autonomous Region, China (Grant No. 2015jjBB7002), in part by the Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, and in part by the Innovation Project of GUET Graduate Education (Grant No. 2018JCX24).

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摘要： In this paper, a high refractive index metamaterial (HRM), whose element is composed of bilayer square patch (BSP) spaced by a dielectric plate, is proposed. By reducing the thickness of the dielectric plate and the gap between adjacent patches, the BSP can effectively enhance capacitive coupling and simultaneously suppress diamagnetic response, which significantly increases the refractive index of the proposed metamaterial. Furthermore, the high refractive index region is far away from the resonant region of the metamaterial, resulting in broadband. Based on these characteristics of BSP, a gradient refractive index (GRIN) lens with thin thickness (0.34λ0, where λ0 is the wavelength at 5.75 GHz) is designed. By using this lens, we then design a circularly polarized horn antenna with high performance. The measurement results show that the 3-dB axial ratio bandwidth is 34.8% (4.75 GHz~6.75 GHz) and the antenna gain in this frequency range is increased by an average value of 3.4 dB. The proposed method opens up a new avenue to design high-performance antenna.

关键词: circularly polarized horn antenna, high refractive index, lens, metamaterial.

Abstract: In this paper, a high refractive index metamaterial (HRM), whose element is composed of bilayer square patch (BSP) spaced by a dielectric plate, is proposed. By reducing the thickness of the dielectric plate and the gap between adjacent patches, the BSP can effectively enhance capacitive coupling and simultaneously suppress diamagnetic response, which significantly increases the refractive index of the proposed metamaterial. Furthermore, the high refractive index region is far away from the resonant region of the metamaterial, resulting in broadband. Based on these characteristics of BSP, a gradient refractive index (GRIN) lens with thin thickness (0.34λ0, where λ0 is the wavelength at 5.75 GHz) is designed. By using this lens, we then design a circularly polarized horn antenna with high performance. The measurement results show that the 3-dB axial ratio bandwidth is 34.8% (4.75 GHz~6.75 GHz) and the antenna gain in this frequency range is increased by an average value of 3.4 dB. The proposed method opens up a new avenue to design high-performance antenna.

Key words: circularly polarized horn antenna, high refractive index, lens, metamaterial.

中图分类号:  (Multilayers; superlattices; photonic structures; metamaterials)

  • 78.67.Pt
84.40.Ba (Antennas: theory, components and accessories) 84.90.+a (Other topics in electronics, radiowave and microwave technology, and direct energy conversion and storage)