Ku/Ka/W三频段单馈源反射面天线设计  

Design of Ku/Ka/W tri-band reflector antenna using single feed

作　　者：方向 范家熠 汪洁[2] FANG Xiang;FAN Jiayi;WANG Jie(Suzhou Institute of Technology,Jiangsu University of Science and Technology,Zhangjiagang 215600,China;College of Electronic and Information Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]江苏科技大学苏州理工学院,江苏张家港215600 [2]南京信息工程大学电信学院,江苏南京210044

出　　处：《现代电子技术》2024年第14期83-88,共6页Modern Electronics Technique

摘　　要：为了简化多频段反射面天线的整体结构与体积,设计一个结构简单的三频段馈源,采用单腔体的形式而非复杂的共轴嵌套式或填充介质等方法,以此来精简整个馈源的设计与加工。为了在Ku/Ka两个相近低频段获得较好的隔离度,分别设计了两个低通的三阶滤波器。使用ANSYS HFSS电磁仿真软件进行Ku/Ka/W三频段单馈源反射面天线设计和优化分析。实际测量时,馈源三个端口的S参数采用矢量网络分析仪测得,馈源及反射面天线系统的增益则在暗室中测量得到。天线仿真设计和实测结果表明,在Ku/Ka/W三个常用频段,即14.5~15.5 GHz、34.5~35.5 GHz及93~95 GHz频率范围内,天线的电压驻波比均小于1.3,各个端口隔离度优于40 dB,具有代表性的三个中心频率点14.5 GHz、35 GHz、94 GHz的天线增益分别为30.5 dBi、34.6 dBi和39.7 dBi,交叉极化优于-23.9 dB,旁瓣电平优于-21.6 dB。所设计的反射面天线实现了频段跨度接近6.5∶1的Ku/Ka/W三频段特性。In order to simplify the overall structure and volume of multiband reflector antennas,a structurally simple tri-band feed is designed by means of the single cavity form instead of complex coaxial nested or filled media methods,so as to simplify the design and processing of the entire feed.In order to achieve good isolation in the two similar low-frequency bands of Ku/Ka,two low-pass third-order filters are designed separately.The design and optimization analysis of Ku/Ka/W tri-band single feed reflector antenna are conducted by means of ANSYS HFSS electromagnetic simulation software.In actual measurement,the S parameters of the three ports of the feed are measured by means of the vector network analyzer,and the gain of the feed and reflector antenna system is measured in a darkroom.The simulation design and actual measurement results of the antenna show that in the three commonly used frequency bands of Ku/Ka/W,namely 14.5~15.5 GHz,34.5~35.5 GHz,and 93~95 GHz frequency range,the voltage standing wave ratio of the antenna is less than 1.3,and the isolation degree of each port is better than 40 dB.The antenna gains at the three representative center frequency points of 14.5 GHz,35 GHz,and 94 GHz are 30.5 dBi,34.6 dBi,and 39.7 dBi,respectively.The cross polarization is better than-23.9 dB,and the sidelobe level is better than 21.6 dB.The designed reflector antenna can realize the Ku/Ka/W tri-band characteristics with a frequency span close to 6.5∶1.

关 键 词：反射面天线 三频段 单馈源 三阶滤波器 面对称结构 频点测试 

分 类 号：TN820-34[电子电信—信息与通信工程] TP311[自动化与计算机技术—计算机软件与理论]