一种宽带宽波束圆极化交叉偶极子天线设计  

Design of a wide-band and wide-beam circularly polarized crossed dipole antenna

作　　者：程静 刘聪聪 郭华 CHENG Jing;LIU Congcong;GUO Hua(School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121

出　　处：《西安邮电大学学报》2023年第2期50-56,共7页Journal of Xi’an University of Posts and Telecommunications

摘　　要：设计了一款覆盖全球卫星导航系统L频段的宽带宽波束圆极化交叉偶极子天线。天线通过加载垂直寄生单元的方式,利用交叉偶极子辐射单元与寄生金属板之间的耦合作用,产生了额外的轴比通带,实现了宽带宽波束的效果。仿真结果表明,天线的阻抗带宽为1.39 GHz(0.82 GHz~2.21 GHz),轴比带宽为1.24 GHz(1.15 GHz~2.39 GHz),另外,天线能在全球卫星导航系统L频段范围内实现超过125°的半功率波束宽度,具有良好的圆极化特性。A wide-band and wide-beam circularly polarized crossed dipole antenna which covers the L-band of satellite communication is proposed.By loading the vertical parasitic element,the antenna uses the coupling effect between the crossed dipole radiating element and the parasitic metal plate to produce an additional axial ratio passband,which realizes the effect of wide-band and wide-beam.Simulation results show that the impedance bandwidth of the antenna is 1.39 GHz(0.82 GHz~2.21 GHz),and the axial ratio bandwidth is 1.24 GHz(1.15 GHz~2.39 GHz).At the same time,the antenna can achieve a half-power beam width of more than 125°in a wide frequency band,which has good circularly polarized characteristics.

关 键 词：圆极化天线 L频段 宽波束 交叉偶极子 

分 类 号：TN431.1[电子电信—微电子学与固体电子学]