曲线轮廓光壁喇叭天线设计与分析  

The Design and Analysis of a Smooth-Walled Spline-Profile Horn

作　　者：刘广[1] 王宏建[1] 张升伟[1] 程岳云[2] 易敏 陈雪[1] 刘世华[2] 

机构地区：[1]中国科学院空间科学与应用研究中心微波遥感部,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《北京理工大学学报》2011年第1期87-91,共5页Transactions of Beijing Institute of Technology

基　　金：国家"八六三"计划项目(2007AA120700)

摘　　要：针对毫米波段波纹喇叭加工困难、加工费用昂贵的问题,提出一种由正弦曲线和高斯曲线组成的曲线轮廓光壁喇叭天线,采用基于有限元算法的高频电磁场仿真软件ANSOFT HFSS对该天线的电特性进行计算,并运用准光理论计算其高斯耦合效率.采用高频平面近场天线测试系统对喇叭实物进行测试,实测结果与波纹喇叭对比,这种曲线轮廓光壁喇叭天线的副瓣电平比波纹喇叭低6.59dB,增益高0.5dB,高斯耦合效率高0.9%,长度短15.8mm,而且易于加工,是一种可替代波纹喇叭的优良性能馈源.At millimeter-wave frequencies, corrugated horns are difficult and expensive to manufacture. As an alternative, a smooth-walled spline-profile horn constituted by sin-profile and Gaussian-profile is presented in this thesis. Its electrical property was calculated using commercially available finite element software： high frequency structure simulator （HFSS） of ANSOFT. The Gaussian coupling efficiency of the horn was calculated using quasi-optical theory. The designed horn was measured using high frequency planar near-field antenna testing system. Testing results indicate that, compared with corrugated horn, the sidelobe of smoothwalled spline-profile horn decreased 6.59 dB, its gain increased 0.5 dB, Gaussian coupling efficiency increased 0.9%, total length shortened 15.8 mm and it was much easier to manufacture. It seems that the presented horn has a high performance and it can be used as a feed source of antenna in stead of corrugated horn.

关 键 词：波纹喇叭 曲线轮廓光壁喇叭 高斯耦合效率 毫米波 

分 类 号：TN82[电子电信—信息与通信工程]