Near-field communication using large-scale antenna arrays is one of the hot research topics in the sixth-generation(6G)wireless communication.Reconfigurable intelligent surface(RIS)is a cost-effective method for manip...Near-field communication using large-scale antenna arrays is one of the hot research topics in the sixth-generation(6G)wireless communication.Reconfigurable intelligent surface(RIS)is a cost-effective method for manipulating electromagnetic waves in the near field.We propose a 2-bit dual-polarized RIS that has the merits of low cost,low power consumption,high phase accuracy,and polarization diversity.Each element consists of an aperture-coupled microstrip patch,two single-pole-fourthrow(SP4T)switches,and two groups of microstrip delay lines.Two-bit phase shift is achieved by using only one SP4T switch that controls the connection of four parallel delay branches.Dual polarization is generated by placing two orthogonal slots with two 2-bit phase shifters.A 15×15 RIS prototype operating in the 3.6 GHz band is fabricated and measured.The beam can be scanned in the±60°range,with a peak aperture efficiency of 40.1%for horizontal polarization and 38.3%for vertical polarization.What is more,the total power consumption of the RIS is merely about 100 mW,which is very attractive for massive deployment in 6G near-field communication.展开更多
基金Project supported by the National Natural Science Foundation of China(No.62071037)。
文摘Near-field communication using large-scale antenna arrays is one of the hot research topics in the sixth-generation(6G)wireless communication.Reconfigurable intelligent surface(RIS)is a cost-effective method for manipulating electromagnetic waves in the near field.We propose a 2-bit dual-polarized RIS that has the merits of low cost,low power consumption,high phase accuracy,and polarization diversity.Each element consists of an aperture-coupled microstrip patch,two single-pole-fourthrow(SP4T)switches,and two groups of microstrip delay lines.Two-bit phase shift is achieved by using only one SP4T switch that controls the connection of four parallel delay branches.Dual polarization is generated by placing two orthogonal slots with two 2-bit phase shifters.A 15×15 RIS prototype operating in the 3.6 GHz band is fabricated and measured.The beam can be scanned in the±60°range,with a peak aperture efficiency of 40.1%for horizontal polarization and 38.3%for vertical polarization.What is more,the total power consumption of the RIS is merely about 100 mW,which is very attractive for massive deployment in 6G near-field communication.
