面向6G毫米波通信的超宽带超材料圆偏振器设计与研究  

Design and research of 6G millimeter wave UWB resonant metamaterial circular polarizer

作　　者：侯佳 周秀杰 李艳芬[1] 袁雪琪 Hou Jia;Zhou Xiujie;Li Yanfen;Yuan Xueqi(Research Institute of China Telecom.,Ltd.,Beijing 102209,China)

机构地区：[1]中国电信股份有限公司研究院,北京102209

出　　处：《电子技术应用》2022年第10期5-8,共4页Application of Electronic Technique

摘　　要：介绍了一种6G毫米波超宽带谐振超材料圆偏振器。该偏振器为单层结构,基底采用10μm超薄聚酰亚胺薄膜,有效降低了偏振器的剖面厚度,并且在一定程度上降低了基底的损耗。圆极化偏振器采用低Q的设计镜像对称T形金属表面,金属厚度为0.6μm,小于该频段的金属趋肤深度,在一定程度上降低了金属超表面结构的金属性,低金属性以及低Q的超表面设计有效提高了该超材料圆偏振器的工作带宽。谐振器采用双谐振型超材料设计方法,对正交等幅同相位正交极化波进行相位调制,从而达到90°相位差形成圆极化波,在中心频率为140 GHz时,3 dB轴向比可以达到54 GHz的带宽,中心带宽可达到39%,插入损耗小于5 dB。A 6G millimeter wave ultra-wideband resonant metamaterial circular polarizer is presented in this paper.The polarizer is a single-layer structure with 10μm ultra-thin polyimide film as the substrate,which effectively reduces the profile thickness of the polarizer and reduces the substrate loss to a certain extent.The circular polarization polarizer uses a low-Q design to mirror the symmetrical T-shaped metal surface,and the metal thickness is 0.6μm,which is less than the skin depth of the metal in this frequency band.To some extent,the gold properties of the metal metasurface structure are reduced.The low-gold properties and low-Q metasurface design effectively improve the operating bandwidth of the metasurface.The resonator adopts a double resonant metamaterial design method to modulate the phase of orthogonal polarization wave with the same amplitude and phase,so as to achieve a 90°phase difference to form a circularly polarized wave.When the center frequency is 140 GHz,the 3 dB axial ratio can reach the bandwidth of 54 GHz,the center bandwidth can reach 39%,and the insertion loss is less than 5 dB.

关 键 词：6G 毫米波 超宽带 圆极化 

分 类 号：TN929.5[电子电信—通信与信息系统]