Dual-band dynamic reconfigurable intelligent surface for signal enhancement in millimeter wave  

作　　者：YAO HuiMing DU XinRun WANG HengBin GAO Song PANG YaChen ZHENG HaiRong GONG HuiWen LI Yi XU JianChun ZHANG JianHua BI Ke 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,School of Science,Beijing University of Posts and Telecommunications,Beijing 100876,China [2]Beijing Key Laboratory of Intelligent Telecommunications Software and Multimedia,Beijing University of Posts and Telecommunications,Beijing 100876,China [3]State Key Laboratory of Networking and Switching Technology,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《Science China(Technological Sciences)》2024年第4期1133-1138,共6页中国科学（技术科学英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities(Grant No.2021XD-A06-1);the National Natural Science Foundation of China(Grant Nos.U2241243,51972033,52102061;61905021);the Beijing Natural Science Foundation(Grant No.JQ22010);the Teaching Reform Projects at BUPT(Grant No.2022CXCYB03);the BUPT Excellent Ph.D.Students Foundation(Grant No.CX2023105)。

摘　　要：Millimeter wave with large bandwidth,high transmission rate,and low delay is considered a reliable alternative to cope with the spectrum shortage.However,the fast attenuation and narrow beam characteristics make it difficult to achieve long-distance or wide-range applications.Here,a 1-bit dual-band reflective reconfigurable intelligent surface(RIS)for signal enhancement in millimeter wave with 16×16 elements is designed,fabricated,and measured.Different from most existent RIS,dynamic programming is realized at two separate frequency bands by integrating the PIN diodes and field-programmable gate array(FPGA).Particularly,the beam deflection,dual-beam,and multi-beam are created based on the coding theory and convolution operation,proving the effectiveness of wavefront manipulation.Moreover,the far-field patterns and signal power with different coding sequences are measured and compared.It is indicated that the received signal power is 6–7 dB stronger than that without coding,which shows good agreement with the desired expectations.The proposed reconfigurable metasurface exhibits great potential in beam forming,making it a promising candidate for progressive wireless communication applications.

关 键 词：DUAL-BAND millimeter wave reconfigurable intelligent surface signal enhancement 

分 类 号：TN929.5[电子电信—通信与信息系统]