高功率线极化径向线阵列天线优化及实验研究

Optimization and experiment research of high power linearly polarized radial waveguide array antenna

为了提高高功率线极化径向线阵列天线性能（口径效率及反射特性等）,实现更优的径向线线极化阵列天线辐射,通过提高单元天线性能、调整阵列布局、改进馈电径向线和探针这3种途径对其进行了优化,并对其进行了理论分析、数值仿真和实验研究。实验结果表明：在中心频率1.57 GHz下,驻波比为1.19,增益为17.65 dBi,轴比为-39.2 dB;在1.47～1.77 GHz的频率范围内驻波比都小于1.4。

The performance affecting factors were analyzed to improve the high power linearly-polarized radial waveguide array antenna in its aperture efficiency,reflection and so on.Based on the analysis,three optimization approaches were adopted,i.e.,improving the performance of cell antenna,adjusting the layout of array antenna and improving the radial waveguide and probe.Theoretical analysis,numerical simulation and experimental measurement of the array antenna were carried out.The experiment shows that at 1.57 GHz,the voltage standing wave ratio（VSWR） is 1.19,the gain is 17.65 dBi,and the axial ratio is-39.2 dB.In the range of 1.47 to 1.77 GHz,the VSWR is below 1.4.