一种全向圆极化天线设计

Design of Omnidirectional circularly polarized Antenna

摘要:

提出了一种基于四臂螺旋结构的新型全向圆极化天线设计方法。通过调整螺旋结构的螺距和直径实现天线的全向圆极化辐射,应用具有移相功能的微带功分器实现螺旋线馈电。对天线的各设计参数进行了分析和优化设计,加工了天线样机,实测结果与计算结果基本一致,在2.05GHz～2.2GHz频率范围内具有良好的全向圆极化辐射特性。

Abstract:

A Design method of omnidirectional circularly polarized antenna based on quadrifilar helix is proposed. By adjusting the pitch and diameter of helical structure, the omnidirectional circularly polarized radiation characteristic is reaslized by the proposed antenna, and a microstrip power splitter with the function of phase shifting is used to realize the helical feed. The design parameters of the antenna are analyzed and optimized, and the prototype antenna is fabricated. The measured results are basically consistent with the simulation results, and the antenna has good characteristics of increasing omnidirectional circular polarization radiation in the 2.05GHz～2.2GHz frequency range.