【作者】 张展赫； 杨雪松；

【Author】 ZHANG Zhanhe;YANG Xuesong;School of Physics,University of Electronic Science and Technology;

【机构】 电子科技大学物理学院；

【摘要】 提出了一种基于平面交叉偶极子的宽波束圆极化天线单元。单元中的一对交叉偶极子用四分之一波长移相线连接实现90°相位差,并引入垂直方向的单极子来扩大天线的圆极化辐射范围。此天线单元具有230°的半功率波束宽度和近190°(Phi=0°)的3 dB轴比波束宽度。基于此天线单元,采用顺序旋转馈电方式组成2 8天线阵列,在3.55 GHz处,波束在俯仰面的扫描角度可达±70°,在该扫描范围内轴比低于3 dB,且最大增益波动范围为2.11 dB。更多还原

【Abstract】 A wide beam circularly polarized antenna unit based on a planar cross dipole antenna is proposed.The cross dipoles of the antenna unit are connected by a quarter phase wavelength shift line to achieve a 90° phase difference,and vertical monopoles are added to optimize circularly polarized radiation effect of the antenna unit.This unit has an HPBW of 230 degrees and a 3 dB ARBW of 190 degrees(Phi=0°).A 28 antenna array is formed based on this unit by sequentially rotating the unit.The scanning angle of the 28 antenna array can reach ±70 degrees at 3.55 GHz,the circular polarization axial ratio within the scanning angle is less than 3 dB,and the maximum gain decrease is 2.11 dB.更多还原