Ku波段双频双极化OMT平板阵列天线设计  

Ku-band Dual-frequency Dual-polarization OMT Array Antenna Design

作　　者：张耀航 Zhang Yaohang(Faculty of Electrical Engineering and Computer Science,Ningbo University,ZheJiang 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《无线通信技术》2024年第4期28-31,共4页Wireless Communication Technology

摘　　要：本文设计了一种应用于12.25GHz-12.75GHz、14GHz-14.5GHz频段的双极化OMT平板阵列天线。天线单元为正交模耦合器加背腔的结构,以双层侧馈的方式实现了水平垂直交叉线极化的辐射模式,然后通过调整馈电对侧的辐射壁上脊的长度解决侧馈辐射相位不对称的问题,通过改变天线单元间槽的长度减小辐射的相互影响。天线的馈电部分通过两层一分六十四的介质集成悬置线功分网络分别对低频和高频极化进行馈电,结构更加紧凑并且减小了传输损耗,通过引入差分结构对中心对称的单元之间进行相位补偿。仿真结果表明,在所需的12.25-12.75GHz、14-14.5GHz频段内|S11|小于-15dB,增益大于26.7dBi,低频和高频的效率分别优于90%和87%,方向图稳定。所设计的天线阵列结构紧凑,高增益高效率,在卫星通信应用中具有良好的前景。In this paper,a dual-polarized OMT plate array antenna is designed for 12.25GHz-12.75GHz and 14 GHZ-14.5 GHz bands.The antenna unit is a structure of orthogonal mode coupler and back cavity.The radiation mode of horizontal and vertical cross-line polarization is realized by double-layer side feed.Then the phase asymmetry of side feed radiation is solved by adjusting the length of the ridge on the radiation wall on the opposite side of the feed,and the radiation interaction is reduced by changing the length of the slot between the antenna units.The feed part of the antenna feeds the low frequency polarization and high frequency polarization respectively through two layers of 1 minute 64 dielectric integrated suspension line power distribution network,which is more compact and reduces the transmission loss.The phase compensation between the center symmetric elements is carried out by introducing a differential structure.The simulation results show that|S11|is less than-15dB in the required frequency bands of 12.25-12.75GHz and 14-14.5GHz,and the gain is greater than 26.7dBi.The efficiency of low frequency and high frequency is better than 90%and 87%,respectively,and the direction pattern is stable.The designed antenna array has the advantages of compact structure,high gain and high efficiency,and has a good prospect in satellite communication applications.

关 键 词：卫星通信 双频双极化 天线阵列 高增益高效率 

分 类 号：TN722[电子电信—电路与系统]