【作者】 王鲁一； 施宏宇； 陈晓明； 衣建甲； 陈娟； 张安学； 刘海文；

【Author】 Luyi Wang;Hongyu Shi;Xiaoming Chen;Jianjia Yi;Juan Chen;Anxue Zhang;Haiwen Liu;School of Information and Communications Engineering,Faculty of Electronic and Information Engineering,Xi’an Jiaotong University;

【机构】 西安交通大学电信学部信息与通信工程学院；

【摘要】 本文提出了一种正交多模态轨道角动量馈电的多波束超表面天线。首先,通过多探针馈电的方式在平行平板波导内激励起两种模态正交的横向轨道角动量模式;再在平行平板波导上板设置周期排列的漏波缝隙,使得波导内的电磁能量可以均匀地泄漏;最后,设计了近场耦合型超表面结构,并组成超表面天线辐射口径面。将正交的轨道角动量模式作为超表面天线的馈源,增加了设计的灵活性,多路通道独立的射频信号可以被无串扰地加载在相应的模态上。超表面结构加载了电可调集总器件,可以对电磁波相位进行360度的调控,最终使超表面天线辐射口径面可以对正交轨道角动量模态进行解耦合并进行独立多波束赋形。更多还原

【Abstract】 In this paper,a multibeam metasurface antenna with orthogonal orbital angular momentum mode feeding is proposed.Firstly,two orthogonal transverse orbital angular momentum modes are excited in a parallel plate waveguide by multi-probe feeding;then periodically arranged slits are etched in the upper plate of the parallel flat waveguide,so that the electromagnetic energy in the waveguide can be leaked uniformly;finally,near-field coupled metasurface structures are designed and form the radiation aperture surface of the metasurface antenna.The orthogonal orbital angular momentum mode is used as the feeding source of the metasurface antenna,which increases the flexibility of the design,and independent RF signals can be loaded on the corresponding modes without crosstalk.The metasurface structure is loaded with electrically tunable lumped components,which can modulate the electromagnetic wave phase by 360 degrees,and finally allow the antenna aperture to decouple the orthogonal orbital angular momentum modes and perform independent multibeam forming.更多还原