基于3D打印的高增益超材料龙伯透镜天线  

High Gain Metamaterial Luneburg Lens Antenna Based on 3D Printing

作　　者：李炫静 冯瑞 谭秋林 Li Xuanjing;Feng Rui;Tan Qiulin(Key Laboratory of Micro/Nano Devices and Systems of Ministry of Education,School of Instrument and Electronics,North University of China,Taiyuan 030051,China;State Key Laboratory of Dynamic Measurement Technology,School of Instrument and Electronics,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学仪器与电子学院微纳器件与系统教育部重点实验室,太原030051 [2]中北大学仪器与电子学院省部共建动态测试技术国家重点实验室,太原030051

出　　处：《微纳电子技术》2024年第11期1-7,共7页Micronanoelectronic Technology

基　　金：山西省重点研发计划(202102030201005);山西省基础研究计划(202203021222070)。

摘　　要：龙伯透镜天线由于可以满足不同应用场景而引起了广泛的研究兴趣。研制了一种满足高增益要求的超材料龙伯透镜天线。基于光学理论和有效介质理论,设计了各向同性的新型单元晶胞,通过调整单元晶胞中介质材料与球形空气腔的体积比,实现球壳的相对介电常数梯度渐变。为此,采用3D打印技术并结合结构变换方法,制作了半径为120 mm的球形龙伯透镜,基于单元晶胞的各向同性实现了透镜的全向均匀性。使用工作频率为6 GHz的贴片天线对透镜进行馈电,在测量中发射多个角度的指向波束以进行实验验证。实验表明,仿真和测试结果具有良好的一致性,证实所制作的龙伯透镜天线具有良好的波束聚焦能力,验证了方案的可行性。最终测得透镜天线的最大增益为25.1 dBi,且制作成本低,有着广阔的应用前景。Luneburg lens antennas have attracted extensive research interest due to their versatility in various applications.A kind of metamaterial Lombard lens antenna was developed to meet the requirement of high gain.Based on the optical theory and effective medium theory,a new isotropic unit cell is designed.By adjusting the volume ratio between the dielectric material in the unit cell and spherical air cavity,the relative dielectric constant gradient variation of the spherical shell was realized.For the purpose,a spherical Luneburg lens with a radius of 120 mm was fabricated by using 3D printing technology combined with the structure transformation method,and the omnidirectional uniformity of the lens was realized based on the isotropy of the unit cell.A patch antenna operating at 6 GHz was used to feed the lens,and pointing beams at multiple angles were emitted during the measurement for experimental verification.The experiments show that the simulation results are in good agreement with the test results,proving that the fabricated Luneburg lens antenna has good beam focusing ability,and verifying the feasibility of the scheme.Finally,the maximum gain of the lens antenna is 25.1 dBi,the production cost is low,and the lens antenna has broad application prospect.

关 键 词：超材料 龙伯透镜 3D打印 梯度折射率 波束生成 

分 类 号：TN82[电子电信—信息与通信工程]