一种宽1dB增益带宽全介质Fresnel透镜天线  

An All-dielectric Fresnel Lens Antenna with 1dB Gain Wide Bandwidth

作　　者：王晨 彭麟[1] 廖欣[1] WANG Chen;PENG Lin;LIAO Xin(School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004

出　　处：《微波学报》2022年第6期26-30,共5页Journal of Microwaves

基　　金：广西研究生教育创新计划(YCSW2021178)。

摘　　要：高增益和宽1 dB增益带宽天线具有重要意义。文中提出一种E波段全介质菲涅尔(Fresnel)波带透镜天线,它包括一个菲涅尔波带透镜以及一个作为馈源的喇叭天线。透镜对电场进行操控,使穿过透镜的电磁波相位变化满足需求,从而使透镜口径面处的电场分布更加均匀。与传统菲涅尔透镜的焦点电场相比,本透镜在焦点处的电场值约提高了1.6~3.0 V,说明透镜的聚焦特性提高,从而实现更高的增益和带宽。该透镜天线的口径为72 mm,整体剖面高度仅为52.47 mm,焦径比为0.66。透镜采用3D打印技术进行加工,降低了加工成本。与传统菲涅尔透镜相比,实测结果表明,该透镜天线在70 GHz峰值增益达到了27.5 dBi,1 dB增益带宽34.2%(63~89 GHz),占总带宽85.53%。High gain and 1 dB gain wide bandwidth antennas are of great significance.In this paper,an E-band alldielectric Fresnel band lens antenna is proposed.The lens antenna comprises a Fresnel zone lens and a feeding horn antenna.By manipulating the electric field through the lens,the phase of the electromagnetic wave passing through the lens can meet the changing requirements,so that the field distribution at the aperture plane of the lens is more uniform.Compared with the focus electric field of the traditional Fresnel lens,the electric field value at the focus of the lens is about 1.6-3.0 V higher,indicating that the focusing characteristics of the lens is improved,so as to achieve higher gain and bandwidth.The aperture of the antenna is 72 mm,the overall profile height is only 52.47 mm,and the focal diameter ratio is 0.66.The lens is processed by 3D printing technology to reduce the processing cost.Compared with the traditional Fresnel lens,the measured results show that the peak gain of the antenna reaches 27.5 dBi at 70 GHz,and the 1 dB gain bandwidth is 34.2%(63-89 GHz),accounting for 85.53%of the total bandwidth.

关 键 词：菲涅尔透镜天线 焦点电场峰值 焦点位置 超宽带 高增益 

分 类 号：TN821.5[电子电信—信息与通信工程]