一种L波段背射模螺旋馈源  

Analysis and Design of L-band Backfire Helix Feed

作　　者：牛传峰[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2008年第9期49-50,共2页Radio Engineering

摘　　要：螺旋天线具有较好的宽频带圆极化特性,在L或S波段体积和增益都很适中,加工制造公差要求较低,因此在该频段螺旋天线得到了广泛的应用。由背射模螺旋构成的L波段宽带馈源具有结构简单,馈电、调试方便,口面遮挡小,频带宽(大于25%),可以承受大功率等优点,可以满足L或S波段测控系统对天线的要求。用该背射模螺旋馈源研制的前馈天线的口径效率超过了53%,第一副瓣小于-20 dB,在工程中得到了很好的应用。Helix antenna is very suitable for circularly polarized radiation. The backfire helix antenna plays an important role in L/S band communication system for its excellent characteristics： simple configuration, easier feeding and adjustment, reduced aperture-blocking effect, broad bandwidth （over 25 % ） and high power handling capability. The theoretical analysis about the backfire helix antenna is made. The detailed dimensions of backfire helix feed are given.The backfire helix feed is well used in a paraboloid antenna,and the tested efficiency of the paraboloid antenna is over 53% and the first sidelobe levels less than -20 dB have been obtained.

关 键 词：馈源 背射模 螺旋天线 宽带 

分 类 号：TN82[电子电信—信息与通信工程]