一种星载低剖面双偏馈反射面天线  

A Spaceborne Low-profile Dual Offset-fed Reflector Antenna

作　　者：潘绍康 贺连星 Pan Shaokang;He Lianxing(Innovation Academy for Microsatelite of CAS,Shanghai 201210;Shanghaitech University,Shanghai 201210)

机构地区：[1]中国科学院微小卫星创新研究院,上海201210 [2]上海科技大学,上海201210

出　　处：《测控与通信》2023年第4期15-17,共3页

摘　　要：本文提出了1种双偏置的反射面馈电天线。在满足天线能量不漏射的前提下,通过优化双反射面天线的偏馈光路,并采用双反射面偏置天线双轴指向机构,从而降低了天线的整体包络尺寸。基于此指向机构的双偏置反射面天线能够在37.5~42.5GHz实现41.5dB的增益,通过旋转主、副反射面可以实现方位角0~360°和俯仰角±55°范围内的波束扫描。相较于传统的卡塞格伦式双反射面天线,剖面降低了50%。A dual offset-fed reflector antenna is proposed in this paper,which optimizes the polarized optical path of the dual-reflector system and utilizes a dual-axis pointing mechanism to reduce the overall envelope size of the antenna while ensuring no energy leakage.Based on this pointing mechanism,the dual offset reflector antenna can realize a gain of 41.5 dB at 37.5-42.5 GHz,and the beam scanning in the range of azimuth 0~3600 and elevation 0~55°by rotating the main and sub reflectors.Compared with the conventional Cassegrain dual reflector antenna,the profile of the proposed antenna is reduced by 50%.

关 键 词：低剖面 高增益 星载天线 波束扫描天线 

分 类 号：TN8[电子电信—信息与通信工程]