均匀照射赋形反射面天线设计  

The design of evened radiation reflector antenna

作　　者：于新华[1] 王俊[1] 王鑫[1] 王宜颖 YU Xinhua;WANG Jun;WANG Xin;WANG Yiying(Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学,桂林541004

出　　处：《电波科学学报》2020年第3期358-363,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61561013);广西自然科学金(2015GXNSFAA139305);2019年度广西高校中青年教师科研基础能力提升项目(2019KY0241);桂林电子科技大学研究生优秀学位论文培育项目(17YJPYSS09);2019广西自然科学基金面上项目(2019GXNSFAA245053)。

摘　　要：为提高反射面天线的照射均匀性,利用波束赋形技术设计一款工作在15 GHz的高性能偏置反射面天线.该天线由一个非均匀有理B样条(non-uniform rational B-splines,NURBS)反射面和一个介质棒馈源组成,NURBS反射面通过物理光学法结合Nelder-Mead优化算法来赋形,从而获得理想的天线辐射场.仿真结果表明,赋形后的反射面天线相对旁瓣电平低于-20 dB,增益在-2.7°~2.7°的波束范围内超过20 dBi,且浮动不超过1 dB.该天线具有结构简单、旁瓣低、增益均匀的特点,在卫星通信等领域具有重要作用.In order to improve the radiation uniformity of reflector antennas,an offset reflector antenna working at 15 GHz is designed by using a beam-forming technology.The reflector antenna consists of a non-uniform rational B-splines(NURBS)reflector and a dielectric rod antenna,and the reflector surface is shaped by using both the physical optics and the Nelder-Mead algorithms to obtain a desired radiation pattern.The simulation results show that the relative side lobe levels of the shaped reflector antenna are below-20 dB,the gains in the beam width of-2.7°to 2.7°are exceed 20 dBi,and its fluctuation does not exceed 1 dB.This antenna has the characteristics of simple construction,low side-lobe and uniform gain,which plays an important role in satellite communication.

关 键 词：反射面天线 波束赋形 NURBS技术 均匀照射 低旁瓣 

分 类 号：TN011[电子电信—物理电子学]