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针对卫星高速通信系统双圆极化、小型化及高可靠性应用需求,设计了一种Ka频段双圆极化高极化隔离度天线,馈源采用大张角波纹喇叭,通过隔板圆极化器实现双圆极化。通过对环焦天线的赋形设计,提高了天线效率,增加了波束内增益。采用NX软件对天线的热环境进行了仿真分析,结果表明热变形对天线的性能影响较小。天线仿真与实测结果吻合较好,实测天线效率大于55%,各项性能指标优于设计要求。
Abstract：A Ka-band dual-circular polarized high-isolation antenna is designed in the paper to meet the circular-polarized radiation and high reliability requirement of high-speed satellite communication system.The feed adopts a wide-flare-angle corrugated horn,and the dual circular-polarized radiation is realized by using the septum polarizer.By means of the shaped design of the ring-focus reflector antenna,the efficiency of the antenna is improved,and the gain of the beam is increased.The thermal environment of the antenna is simulated by using the NX software.The results show that the thermal deformation has little effect on the performance of the antenna.The experimental results are consistent with the simulated results,with the efficiency more than 55%,and are superior to the technical specification requirement.
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基本信息:
DOI：
中图分类号:TN820
引用信息:
[1]张丽娜,刘伟栋.一种Ka频段双圆极化天线设计及热变形分析[J].无线电工程,2017,47(04):58-64.
基金信息:
国防科研基金资助项目