一种S频段小型自跟踪馈源设计  

Design of an S-band small-sized self-tracking feed source

作　　者：崔昌娟 王珂 李建军 王红 CUI Changjuan;WANG Ke;LI Jianjun;WANG Hong(Shaanxi Key Laboratory of Antenna and Control Technology,No.39 research institute of CETC,Xi’an 710065,China)

机构地区：[1]中国电子科技集团公司第三十九研究所陕西省天线与控制技术重点实验室,西安710065

出　　处：《空间电子技术》2021年第4期79-84,共6页Space Electronic Technology

摘　　要：为了使2 m小口径环焦天线具有S频段自跟踪功能,设计了一种小型化紧凑型馈源网络。该馈源和通道由4波束经电桥网络形成左右旋圆极化和信号,差通道由8波束经电桥网络形成左右旋圆极化差信号,和差信号共同工作实现馈源的自跟踪功能。实测结果表明,在2.2 GHz~2.4 GHz频率范围内,和通道回波损耗S11≤-23.32 dB,端口隔离≤-17.71 dB,和差隔离≤-46.03 dB,轴比≤0.65 dB,实测结果满足设计指标要求。整个小型化馈源网络横向尺寸≤250 mm,纵向尺寸≤420 mm,在小口径面天线中有效替代传统S频段圆波导TE21模自跟踪馈源,避免其尺寸大引起信号质量差的问题。A compact feed network is designed in order to make the 2 m small aperture ring-focus antenna a self-tracking function.LHCP and RHCP of Sum channel is formatted of 4 beams and LHCP and RHCP of difference channel is formatted of 8 beams.The function of self-tracking is realized by combining with sun and difference signals.The measured results of feed show that reflection coefficient≤-23.32 dB,port isolation≤-17.71 dB,sum and difference isolation≤-46.03 dB,and axial ratio≤0.65 dB in the frequency range of 2.2 GHz to 2.4 GHz.The measured results meet the requirements of the index.The size of whole feed is less than 250 mm in the horizontal and is less than 420 mm in the longitudinal.It can effectively replace the traditional S-band circular waveguide self-tracking feed in a small aperture antenna,avoiding signal quality problems caused by larger size.

关 键 词：小型化紧凑 自跟踪馈源 S频段 

分 类 号：V747[航空宇航科学技术]