双频双圆极化共口径天线设计  

Design of Dual-frequency Dual-circularly Polarized Common Aperture Antenna

作　　者：孙良伟 王忍[1] SUN Liang-wei;WANG Ren(No.36 Research Institute of CETC,Jiaxing Zhejiang 314033,China)

机构地区：[1]中国电子科技集团公司第三十六研究所,浙江嘉兴314033

出　　处：《通信对抗》2021年第2期26-29,33,共5页Communication Countermeasures

摘　　要：设计了一款X/Ku波段的双频双圆极化共口径天线。首先,采用微带开槽的方法分别设计了单层结构的低频右旋和高频左旋圆极化单元。然后,通过合理的布局,设计了两套独立的顺序旋转馈电阵列,提高了天线的增益和圓极化轴比。仿真结果显示,X波段天线的-10dB阻抗带宽为10.23GHz~11.32GHz(相对带宽为10.19%),圓极化带宽为10.61GHz~10.94GHz(相对带宽为3.08%);Ku波段天线的-10dB阻抗带宽为16.51GHz~18GHz(相对带宽为8.61%),圆极化带宽为17.02GHz~18GHz(相对带宽为5.66%)。高低频的隔离度在θ从-30到30°的范围内保持在10dB以上,有很好的圆极化特性。所设计的天线结构简单,尺寸小,圆极化性能好,隔离度高,可应用于卫星通信中。In this paper,a X/Ku band dual-frequency dual-circularly polarized common aperture antenna is designed.First,the low-frequency right-handed and high-frequency left-handed circular polarization ele-ments with single-layer structure are designed by means of microstrip grooving.Then,through reasonable lay-out,two sets of independent sequential rotating feed arrays are designed to improve the gain of the antenna and the ratio of the circular polarization axis.Simulation results show that-10dB impedance bandwidth of X-band antenna is 10.23-11.32GHz(10.19%relative bandwidth),and the circular polarization bandwidth is 10.61-10.94GHz(3.08%relative bandwidth);the-10dB impedance bandwidth of Ku-band antenna is 16.51-18GHz(8.61%relative bandwidth),and the circular polarization bandwidth is 17.02-18GHz(relative band-width is 5.66%).Both high and low frequency main polarization and cross polarization can stay above 10dB in the range of theta from-30°to 30°,so they have good circular polarization characteristics in a wide Angle.The antenna designed in this paper is simple in structure,small in size,good in circular polarization and high in isolation.It can be used in satellitle communication.

关 键 词：双频双圆极化 共口径天线 顺序旋转馈电 

分 类 号：TN82[电子电信—信息与通信工程]