圆极化十字交叉振子馈源设计与实现

由于圆极化天线不需要复杂的跟踪系统就可获得较好的极化匹配,现代许多卫星和地面的点到点通信为了在链路预算中使极化效率最大化,都使用了圆极化电波来传输.笔者对线性天线的自阻抗进行了分析,给出了十字交叉振子圆极化馈源的有效设计方法,采用一种开槽的单馈线激励十字交叉振子,并给出了适用设计的曲线.且采用电磁场仿真软件HFSS,计算了振子圆极化馈源的增益和圆极化轴比,仿真结果表明设计实用、可行.

Design and Realization of Circular Polarized Crossed Dipole Feeds

The polarization match between the antennae operated in the circular polarization mode can be maintained well without the use of complex tracking systems,many modern satellite and terrestrial point-to-point communications systems use circular polarization(CP) wave propagation in order to maximize the polarization component of the link budget.The effective design method of circular polarized crossed dipole feeds is presented analyzing the self-impedance of linear antennas and the useful design curves also is given here,the crossed dipoles is excited by a single hard coaxial-cable with a slot.The gain and circular polarized axial-ratio of the crossed dipoles is calculated with the electromagnetic simulation software HFSS,the results indicate that the design is reasonable and practical.