一种多波束可旋转的金属波导太赫兹阵列天线  

A multibeam rotatable metallic waveguide terahertz array antenna

作　　者：蒋钊 黄峻堃 张敏[1,2] 苏红 李玲[1,2] 梁华伟 Jiang Zhao;Huang Junkun;Zhang Min;Su Hong;Li Ling;Liang Huawei(Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,Shenzhen University,Shenzhen,Guangdong 518060,China;North Night Vision Technology Co.,Ltd,Kunming,Yunnan 650106,China)

机构地区：[1]深圳大学物理与光电工程学院激光工程重点实验室,广东深圳518060 [2]深圳大学光电子器件与系统教育部/广东省重点实验室,广东深圳518060 [3]北方夜视技术股份有限公司,云南昆明650106

出　　处：《光电工程》2023年第9期63-69,共7页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(11874270);广东省自然科学基金资助项目(2022A1515011383,2022A1515011389);深圳市科技计划项目(JCYJ20200109105825504)。

摘　　要：随着移动通信的高速发展和通讯环境的日益复杂,多波束天线在多目标雷达、卫星通信以及多点无线通信等领域有着广泛的应用需求。轨道角动量是电磁波的基本属性之一,它具有螺旋形波前,可独立于振幅、相位、偏振等基本属性,能为电磁波提供新的复用维度。基于亚波长金属波导阵列对电磁波优异的调控能力,我们设计了一种多波束可旋转的太赫兹(THz)阵列天线,通过调控入射波两正交偏振分量的相位分布,可将其分别转化成强度分布一致、阶数相反的涡旋波束。通过改变两分量的相位差,可实现45°偏振方向上波束的干涉图样发生旋转。此外,该阵列天线还展现出了高增益(31 dBi)和宽带宽(61 GHz)的特性。该工作可为基于多波束阵列天线的方位角测量提供新的思路,对丰富THz频段的阵列天线设计具有重要意义。With the high-speed development of mobile communication and the increasingly complex communication environment,multibeam antennas are widely required in the application fields of multi-target radar,satellite communication,multi-point wireless communication,etc.Orbital angular momentum is one of the fundamental properties of electromagnetic waves.It has a spiral wavefront and is independent of basic properties such as amplitude,phase,and polarization.It can provide a new multiplexing dimension for electromagnetic waves.Based on the excellent electromagnetic control capability of the sub-wavelength metal waveguide array,we designed a multibeam rotatable terahertz(THz)array antenna.By adjusting the phase distribution of two orthogonal polarization components of the incident wave,they can be transformed into two vortex beams with the same intensity distributions and opposite orders.The interferometric patterns in the 45°polarization direction can be rotated by changing the phase difference between the two components.Moreover,the array antenna also shows the performance of high gain(31 dBi)and wide bandwidth(up to 61 GHz).This work can provide a new way for azimuth measurement based on multibeam array antennas and is of great significance to enrich the design of array antennas in the THz band.

关 键 词：太赫兹波 涡旋波束 多波束天线 方位角测量 

分 类 号：O441.4[理学—电磁学]