A dual-band reconfigurable intelligent metasurface with beam steering

作者：Lin, Hai^*; Yu, Wen; Tang, Rongxin^*; Jin, Jing; Wang, Yumei; Xiong, Jie; Wu, Yanjie; Zhao, Junming

来源：Journal of Physics D - Applied Physics, 2022, 55(24): 245002.

DOI：10.1088/1361-6463/ac5663

• reconfigurable metasurface
• coding metasurface
• dual-band
• beam steering

In recent years, reconfigurable metasurfaces have become research hotspots since they can manipulate electromagnetic waves dynamically and flexibly. The realisation of cost-effective and energy-efficient wireless communications via reconfigurable intelligent surfaces (RISs) is attractive in various application scenerios. In this work, a +45 degrees-polarized dual-band reconfigurable metasurface with beam steering ability is proposed to combat signal attenuation in wireless communications. By varying the bias voltages of the integrated varactors in the specially designed meta-atom, 0 and pi phase responses have been excited around both 2.4 and 5.8 GHz. Taking advantage of this unique feature, we proposed a one-bit coding RIS device which provides dual-band application. To validate the proposed concepts, a reconfigurable metasurface composed of 16 x 16 elements was fabricated and measured. The measurement results agree well with the simulation, so the proposed prototype is a promising candidate for future intelligent communications.

• 单位
  南京大学; 南昌大学