X波段圆极化天线的设计与实验  

Design and experiment of X-Band circularly polarized antenna

作　　者：王佑贞[1] 王平连[1] 林苗[1] 

机构地区：[1]中国科学院光电研究院,北京100190

出　　处：《电子测量技术》2010年第2期26-28,52,共4页Electronic Measurement Technology

摘　　要：介绍了一种圆极化宽带圆锥喇叭天线,用于地检设备子系统中。天线的圆极化性能是通过金属螺钉在圆波导的管壁对称地插入,等间隔排列来实现的,螺钉直径与插入深度由计算得出。为实现信号低反射馈入,馈电端口采用了矩-圆波导转换器,完成了从矩形波导过渡到圆形波导。天线的辐射器采用了传统的圆锥喇叭。使用CST微波工作室仿真该天线,并调整各部分的尺寸,使得天线性能最优化。实验测量数据与仿真结果吻合较好,在400 MHz的工作带宽内,天线增益大于14.5 dB,增益平坦度好,轴比小于1.5 dB,驻波比小于1.2。A circularly polarized antenna is introduced. The design of the antenna is based on practical need for a type of satellite ground cheekout-systen. The circular polarized field is realized using metal screws inserted in circular waveguide and equally spaced. The diameter and depth of the screws are theoretically analyzed. For low signal reflection, rectangular to circular converter is used in the excitation port. Conic horn is used for radiation. The antenna is simulated using CST microwave studio. By adjusting the parameters of the antenna, optimal design for the antenna is gotten Measured results agree well with the simulated results. In 400 MHz working frequency band, antenna gain is 14. 5 dB, axial ratio is below 1.5 dB, and VSWR is less than 1.2.

关 键 词：圆极化 圆锥喇叭 CST 

分 类 号：TN82[电子电信—信息与通信工程]