一款致冷超宽带双极化四脊喇叭馈源的研制  

Development of a refrigeration UWB dual-polarized quadruple-ridged horn

作　　者：罗蓉 邓凯华 吴声贤 冯来平[3,4] LUO Rong;DENG Kaihua;WU Shengxian;FENG Laiping(The 39th Research Institute of China Electronic Technology Corporation,Xi'an 710065,China;The 16th Research Institute of China Electronic Technology Corporation,Hefei 230043,China;Xi'an Research institute of Surveying and Mapping,Xi'an 710054,China;State key Laboratony of Geo-Information Engineering,Xi'an 710054,China)

机构地区：[1]中国电子科技集团第三十九研究所,陕西西安710065 [2]中国电子科技集团第十六研究所,安徽合肥230043 [3]西安测绘研究所,陕西西安710054 [4]地理信息工程国家重点实验室,陕西西安710054

出　　处：《测绘科学与工程》2020年第2期26-31,共6页Geomatics Science and Engineering

摘　　要：本文结合三维全波电磁仿真软件,分析了四脊波导尺寸对波导特性阻抗的影响,优选了同轴四脊波导转换的馈电探针位置和喇叭辐射段脊曲线与喇叭璧曲线,研制了一款应用于致冷环境下的高性能超宽带2GHz^14GHz、双极化四脊喇叭。仿真和实测结果表明,在工作频带内的驻波优于2:1,主波束等化特性良好。致冷状态下,对系统引入的噪温小于2.5K,显著提高了系统的增益与噪温之比,很好满足了工程应用需求。With the application of the three-dimensional full-wave electromagnetic simulation software,the influence of the size of the four-ridge waveguide on the characteristic impedance of the waveguide is analyzed.The position of the feed probe of the coaxial four-ridge waveguide,and the curve of the horn ridge and wall of radiating section are selected to develop an ultra wide band(UWB)dual-polarized quadruple-ridged horn with high performance broadband 2 GHz to 14 GHz used in refrigeration environment is manufactured.The simulation and measurement results show that the standing wave ratio is less than 2:1 in the whole operation frequency band and the main beam equalization characteristics are good.In the refrigeration state,the noise temperature introduced to the system is less than 2.5 K.The G/T value of the system is significantly improved,which satisfies the requirements of engineering application.

关 键 词：VLBI 超宽带 四脊喇叭 低温电子学 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]