研究了一种Ku波段多单元矩形径向线子阵馈电系统。为了满足特定耦合量的要求,提出了一种层叠式的新型耦合探针,并以此为基础,对中心频率为12.5 GHz的28单元矩形栅格径向线子阵馈电系统进行了设计与分析。模拟仿真结果表明：该口径为61.6 mm×125.2 mm的馈电系统在12.5 GHz中心频率处反射系数为0.015,耦合不平衡度为1.05 dB；同时在12.2～12.7 GHz的频带范围内,反射系数小于0.1,耦合不平衡度最大值为2.62 dB,基本满足了28路等幅馈电输出的要求。

This paper studies a Ku-band rectangular radial line sub-array feed system. In order to meet the requirement of specific coupling, this paper proposes a new type of coupling probe with superposition structure, and on this basis, the center frequency of 12.5 GHz 28 unit sub-array rectangular grid radial line feed system is designed and analyzed. Simulation results show that: The diameter of 61.6 mm×125.2 mm feed system in the center frequency of 12.5 GHz has a reflection coefficient of 0.015, and a roughness of 1.05 dB. At the same time, within the scope of 12.2-12.7 GHz frequency band, the reflection coefficient is less than 0.1, and the maximum roughness of amplitude is 2. 62 dB, and the feed system basically meets the requirements of continuous feed output for 28 ports.