Dual-mode coaxial feed with low crosspolarisation
Dual-mode coaxial feed with low crosspolarisation
复制标题
具有低交叉极化的双模同轴馈电
DOI：
10.1049/ip-h-1:19840082
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发表时间：
1984
影响因子：
--
通讯作者：
H. Schilling
中科院分区：
文献类型：
--
作者：
R. Collin;H. Schilling
给出了优化的TE11-TM11双模同轴主聚焦馈源的设计数据。优化后的馈源在5%的带宽内，交叉极化小于-30分贝，输入反射系数小于0.1，辐射方向图的相位误差很小。文中还给出了实验样图，表明理论推导的设计数据是可靠的。优化后的馈源适用于焦长/直径比在0.3到0.5范围内的抛物面反射器，在旁瓣低于-30dB的情况下，总体效率将高达70%或更高。
Design data for optimised TE11-TM11 dual-mode coaxial prime focus feeds is presented. The optimised feeds have a crosspolarisation below -30 dB, an input reflection coefficient below 0.1 and very little phase error in their radiation patterns, over a 5% bandwidth. Experimental patterns are also given that show that the theoretically derived design data can be relied upon. The optimised feeds are useful for paraboloidal reflectors with focal-length/diameter ratios in the range 0.3 to 0.5, and will give overall efficiencies as high as 70% or more with sidelobes below -30dB.