一种宽带低剖面动中通天线单元的设计  

A Broadband and Low Profile Array Element for “Satcom on the Move” Application

作　　者：郑文泉 马岩冰 薛玲珑 黄一 

机构地区：[1]上海航天电子技术研究所,上海201109

出　　处：《无线电工程》2016年第12期54-57,共4页Radio Engineering

基　　金：上海航天技术研究院核攀基金资助项目(ZY2014-023)

摘　　要：针对目前移动卫星通信系统中对天线性能、形式的需求,设计了一种宽带低剖面动中通天线单元。该天线单元由加载金属栅格的二联装角锥喇叭天线、正交模耦合器和H-T波导功分器组合构成。其中正交模耦合器采用阶梯阻抗匹配的方波导与耦合波导相结合的方法作分析设计。仿真结果表明,天线单元的带宽可达到30%,极化隔离度在-62 dB以下,同时天线单元结构紧凑,剖面较低。According to the requirements of mobile satellite communications on antenna performance and shape,a broadband and low profile array element of ＂Satcom on the Move＂ is presented.The antenna cell can be comprised of two pyramidal horn antennas with metal grids,Orthomode Transducer （OMT） and H-T waveguide power divider. The OMT adopts the idea of square waveguidc using stepped impedance matching method combined with a coupling waveguide together.The simulated resuhs indicate that with an optimum design,the bandwidth of the antenna element can be up to 30% with the polarized isolation below -62 dB and the aperture and profile minimized.

关 键 词：宽带 低剖面 角锥喇叭天线 正交模耦合器 波导功分器 

分 类 号：TN82[电子电信—信息与通信工程]