Metasurface-based wideband, low-profile, and high-gain antenna

作者：Yang, Zhen-Zhong; Liang, Feng^*; Yi, Yu; Zhao, Deshuang; Wang, Bing-Zhong

来源：IET Microwaves Antennas & Propagation, 2019, 13(4): 436-441.

DOI：10.1049/iet-map.2018.5111

• broadband antennas
• antenna feeds
• microstrip antennas
• genetic algorithms
• metasurface-based wideband antenna
• low-profile antenna
• high-gain antenna
• dual-layer metasurface
• metallic layers
• dielectric layers
• square patch cells
• aperture coupled layer
• resonant frequencies
• genetic algorithm
• geometrical parameter optimisation
• wideband characteristics
• gain bandwidth
• impedance bandwidth
• gain 3 dB
• bandwidth 4
• 08 GHz to 6
• 38 GHz
• 16 GHz to 6
• 56 GHz

A wideband, low-profile, and high-gain antenna loaded with a dual-layer metasurface is proposed in this study. The metasurface consists of two metallic layers printed on two dielectric layers, in which each metallic layer contains an array of $4 \times 4$4x4 square patch cells. The proposed antenna is fed by an aperture coupled layer under the metasurface. This design makes the antenna work at two different modes with different resonant frequencies close to each other, to enhance the bandwidth. To achieve the best bandwidth performance, a genetic algorithm is adopted to optimise the geometrical parameters of this antenna. This metasurface-based antenna maintains a low profile of $0.09\lambda _0$0.09 lambda 0 at 5 GHz, meanwhile yields wideband characteristics for both the impedance and gain bandwidth. The -10 dB impedance bandwidth of the proposed antenna is about 44% (4.08-6.38 GHz) and the 3 dB gain bandwidth reaches 45% (4.16-6.56 GHz) with a peak realised gain of 11.6 dBi. A prototype of the antenna is fabricated and the measured results demonstrate the authors' design.

• 出版日期2019-3-27
• 单位电子科技大学