星载宽波束圆极化天线设计  

Design of a satellite-borne wide-beam circular polarization antenna

作　　者：冯文文[1] 李磊[1] 王群杰[1] 邹永庆[1] FENG Wen-wen;LI Lei;WANG Qun-jie;ZOU Yong-qing(No.38 Research Institute of CETC, Hefei 230088)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088

出　　处：《雷达与对抗》2020年第4期38-40,58,共4页Radar & ECM

摘　　要：介绍了一种工作在S波段的星载宽波束圆极化天线的设计。该天线采用双臂螺旋天线结构形式,由螺旋天线、馈电同轴线、裂缝巴伦、复合支撑材料及射频连接器等部分组成。利用电磁仿真软件Ansoft HFSS对螺旋天线的匝数、螺距和直径进行仿真优化,使其在收发两个频点下均满足天线增益在±70°波束覆盖范围内大于1 dB的指标要求,天线轴比优于6 dB。加工一套天线实物,并在球面近场暗室进行测试。实测结果显示,天线指标与设计指标相符,为类似天线设计提供了参考。An S-band space-borne wide-beam circularly polarized antenna is designed,and it adopts a bifilar helix structure,consisting of the helical antenna,coaxial feeder,slot balun,composite supporting material,and RF connectors.The structural parameters such as turns,pitch,and diameter are optimized through the electromagnetic simulation software Ansoft HFSS with the criterion that the antenna gain is higher than 1 dB within±70°beam coverage,and the axial ratio is less than 6 dB.An antenna prototype is fabricated and tested in the microwave anechoic chamber.The measurement results show that the antenna performance is in accordance with the design specifications,providing reference for similar antenna design.

关 键 词：星载 天线 宽波束 圆极化 

分 类 号：TN823.31[电子电信—信息与通信工程]