宽带、双极化四脊喇叭馈源研究

Broadband and dual-polarized horn feed source

研制了一种用于抛物面天线馈源的高性能宽带、双极化四脊喇叭天线.利用三维全波电磁场仿真(Computer Simulation Technology,CST)软件分析了喇叭天线中后腔的形状和结构参数以及馈电探针位置对天线驻波比的影响,对天线的整体结构参数进行了优化,并对其进行加工测试.模拟和实验测试结果表明:采用渐变后腔,并取合适的结构参数和馈电探针位置,馈源天线能得到最佳驻波比,在4～12GHz的工作频带范围内小于2、-12dB的边缘照射角大于90°,馈源的其它电性能参数符合设计要求.

A high performance broadband and dual-polarized horn antenna,which serves as a feed source of a paraboloid antenna,is designed.The effect of the back-cavity on wave station is studied.Simultaneously,the parameters of the whole antenna are optimized by CST software,and the antenna is produced and measured.The measured and simulation results show that the voltage standing wave ratio（VSWR） in whole operation frequency range is less than 2 when adaptive parameters of back-cavity and position of pin are chosen.Furthermore,the other electric performances meet the demand of design.