加载腔体的高增益宽带圆极化交叉偶极子天线设计  

Design of high gain wideband circularly polarized cross dipole antenna with loaded cavity

作　　者：秦永娟 冯立营 QIN Yongjuan;FENG Liying(School of Electronic Engineering,Tianjin University of Technology and Education,Tianjin 300222,China)

机构地区：[1]天津职业技术师范大学电子工程学院,天津300222

出　　处：《天津职业技术师范大学学报》2024年第2期50-55,共6页Journal of Tianjin University of Technology and Education

基　　金：天津市教委科研计划重点项目(2022ZD011)。

摘　　要：设计了一种加载腔体的高增益宽带圆极化交叉偶极子天线,该天线印刷在方形电路板上下两侧,偶极子天线被设计成顺序旋转的L形辐射贴片,并在方形介质基板中心位置设计一条用于阻抗匹配的圆环线,从而实现良好的圆极化性能。通过改变地板反射器的传统尺寸以及在四周加载金属腔体,圆极化性能整体得到了较大提升。通过Ansys HFSS电磁仿真软件进行仿真,结果表明:电压驻波比(voltage standing wave ratio,VSWR)<2的阻抗带宽为57.03%(1.78~3.20 GHz),3 dB轴比带宽为31.66%(2.18~3.00GHz),在工作带宽内的平均右旋圆极化峰值增益为10.79dBic。A high-gain broadband circular-polarized(CP)cross dipole antenna loaded with cavity is designed and printed on the upper and lower sides of the square circuit board.The dipole antenna is designed as sequentially rotated L-shaped radiating patches,and a circular ring line is positioned at the center of the square dielectric substrate for impedance matching,so as to achieve good circular polarization performance.In addition,by changing the traditional dimensions of the floor reflector and loading metal cavities around it,the overall circular polarization performance is greatly improved.The simula-tion results of Ansys HFSS electromagnetic simulation software show that with a Voltage Standing Wave Ratio(VSWR)<2,the antenna exhibits an impedance bandwidth of 57.03%(1.78~3.20 GHz),a 3 dB axial ratio bandwidth of 31.66%(2.18~3.00 GHz),and an average peak gain of 10.79 dBic for right-hand circularly polarized(CP)within the operating bandwidth.

关 键 词：圆极化天线 交叉偶极子天线 高增益 

分 类 号：TN821.1[电子电信—信息与通信工程]