【作者】 黄涛； 唐璞；

【Author】 Huang Tao;Tang Pu;Microwave and Antenna Engineering of UESTC;

【机构】 电子科技大学微波与天线工程；

【摘要】 通过对一般偶极子圆极化天线波束宽度和轴比的分析,提出了对下垂十字振子加金属立柱,并使用开槽同轴进行同相馈电,改变振子臂长获得宽波束圆极化波的方法。经过HFSS软件的仿真和优化得到两对振子的臂长,同轴的高度,以及金属立柱的最佳尺寸,使波束宽度最宽可以达到140度以上,并且轴比在俯仰角110度范围内都小于4dB,有很好的宽波束圆极化性能。并且在同轴内部加入特殊结构,实现良好的阻抗匹配,降低驻波比。更多还原

【Abstract】 Through the analysis of the beam width and axial ratio from normal cross dipole,a method was proposed as using a metal column and coaxial cable with a slot on the pendulous cross dipole to get wide circular polarized beam with changing the length of the arm. We can get 140 degree beam width and lower than 4dB axial between 110 degree by using the simulation and optimization on the arm‘s length and the height of coaxial cable and dimension of the metal column from HFSS. Meanwhile,we put a particular structure inside the coaxial cable to get a better impedance matching to reduce the VSWR.更多还原