一种星载Ka频段侧馈偏置卡塞格伦多波束天线设计

Design of a Ka Band Side-Fed Offset Cassegrain(SFOC) Multibeam Antenna in Satellite

本文提出了一种应用于Ka频段高通量卫星的侧馈偏置卡塞格伦(SFOC)多波束天线设计。根据技术要求,优化设计SFOC多波束天线反射面结构参数、喇叭馈源尺寸和馈源阵列布局,利用仿真软件Grasp 9进行了多波束天线仿真分析,最后给出了产品实测结果,结果与设计一致,交叠增益大于40d Bi,旁瓣电平小于-23dB,载干比大于14dB。

A side-fed offset Cassegrain(SFOC) multi-beam antenna used in Ka-band high throughput satellite(HTS) is presented in this paper. The parameters of the antenna and feed horn array are optimized and designed in detail. Finally, the test results agree with the design by Ticra Grasp 9, which show that the EOC>40dBi, SLL<-23 dB, C/I>14dB.