单脉冲环焦天线和差一体化设计  

Sum-Difference Unified Design of Monopulse Ring-Focus Antenna

作　　者：程臻[1] 吕善伟[1] 姜新发[2] 

机构地区：[1]北京航空航天大学电子工程系 [2]中国航天机电集团二院23所

出　　处：《北京航空航天大学学报》2001年第1期12-15,共4页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：分析了单脉冲环焦天线差通道性能较差的原因 ,推荐了适用的和差口径分布函数 ,得出了所需馈源差方向图计算式 ,提出了和差性能一体化设计步骤 .为了验证理论方法的正确性 ,以 3.5m变极化赋形单脉冲环焦天线为例 ,用本文提出的方法修改设计 ,使“和差矛盾”由 6.5dB减为 4.2dB ,差方向图分离角由 1 .9°降为 1 .4° .因此 ,使用特殊设计的单脉冲馈源可望将归一化差斜率提高到 1 .4.The relatively poor performance of difference channel of a monopulse ring-focus antenna is accounted for, suitable aperture distribution functions are recommended, formulae of feed difference pattern needed are presented and sum-difference unified design method is put forward. To testify the theoretical method, a 3.5m C-band monopulse shaped ring-focus antenna with dual-polarization was taken as an example. By using the presented method, the gain difference between the sum channel and the different channel is reduced from 6.5 dB to 4.2 dB, and the separation angle of the apexes of the different pattern of the antenna from 1.9° to 1.4°. Therefore, the normalized slope of difference pattern arrives at 1.4 with a particular monopulse feed.

关 键 词：单脉冲环焦天线 单脉冲天线 方向图 口面效率 和差通道 双反射面天线 

分 类 号：TN827.5[电子电信—信息与通信工程]