面向5G通信的圆极化基片集成波导研究  

Research on circularly polarized SIW for 5G communication

作　　者：霍兴瀛 薛端 刘佳怡 秦鹏[1] 李沓 Huo Xingying;Xue Duan;Liu Jiayi;QinPeng;Li Ta(School of Computer Science,Liupanshui Normal University,Liupanshui 553004,China)

机构地区：[1]六盘水师范学院计算机科学学院,贵州六盘水553004

出　　处：《六盘水师范学院学报》2024年第6期40-46,共7页Journal of Liupanshui Normal University

基　　金：国家自然科学基金项目“适用于受限空间电波覆盖的智能天线研究”(62261034);六盘水市科技计划项目“基于边缘计算的智能网联无人车路径规划关键技术研究”(52020-2024-GK-02);六盘水师范学院高层次人才科研启动项目“基于多接入边缘计算的互联无人车路径规划方法研究”(LPSSYKYJJ202318)。

摘　　要：圆极化天线是指辐射电场矢量末端轨迹在垂直于传播方向平面上的投影是一个圆形的天线,在各频段雷达、定位及无线通信系统等领域都具有广泛应用。研究基于5G通信的5.8GHz频段,设计了一种周期缝隙基片集成波导(Sub-strate integrated waveguide,SIW)。首先根据介质波导截止频率计算方法及矩形波导与基片集成波导结构尺寸映射关系,理论上确定基片集成波导横截面尺寸,以保证该结构能够在5.8GHz频段具有良好的传输特性。然后在基片集成波导上表面设计横向周期性缝隙,对该结构进行扰动使其产生漏波,并设计周期长度,将谐波进行抑制,使天线只利用基波辐射。接着对缝隙位置及尺寸进行优化,使天线在口面上产生两个相位相差90°的正交场分量,从而辐射圆极化波。仿真结果表明,天线S11<=-10dB的阻抗带宽为5.6GHz-7GHz,具有良好的传输特性。5.8GHz时,该周期性缝隙基片集成波导在具有良好的圆极化特性,增益为7.3dBi,效率为89.5%,轴比仅为0.21dB。该天线设计简单,剖面低,易馈电且易集成,具有较好的研究价值与应用前景。Circularly polarized antenna refers to an antenna whose projection of the end track of the radiated electric field vec-tor on the plane perpendicular to the propagation direction is a circle,and is widely used in radar,positioning and wireless commu-nication systems and so on in various frequency bands.In this research,a periodical slotted substrate integrated waveguide(SIW)is designed based on 5.8GHz band of 5G communication.Firstly,according to the cutoff frequency calculation method of the di-electric waveguide and the mapping relationship between rectangular waveguide and SIW structure,the cross-section size of the proposed SIW is determined theoretically to ensure that the structure can enjoy a good transmission property in 5.8GHz band.Then the transverse periodical slots are designed on the upper surface of the SIW to disturb the structure,producing leaky wave only from fundamental mode,with the harmonics suppressed.By optimizing the position and the size of the slot,the antenna can generate two orthogonal E-field components with 90°phase difference on the aperture,thus achieving circularly polarized radi-ation.The simulation result shows that the antenna has an impedance bandwidth with S11<=-10dB from 5.6GHz to 7GHz,with good transmission property.In 5.8GHz frequency band,the periodically slotted antenna has good circular polarization characteris-tics,with gain 7.3dBi,efficiency 89.5%and axial ratio below to 0.21dB.This antenna has a simple design and a low profile,and is easy to be fed and integrated,which shows good research value and application prospect.simple design and a low profile,and is easy to be fed and integrated,which shows good research value and application prospect.

关 键 词：基片集成波导 圆极化 漏波天线 周期性结构 

分 类 号：TN92[电子电信—通信与信息系统]