一种低剖面全向圆极化天线的设计

Design of a Low-Profile Omnidirectional Circularly Polarized Antenna

本文提出了一种基于环天线-电偶极子模型的全向圆极化天线,该天线可用于5G通信。为使天线结构更为紧凑,采用低剖面的单极子来产生垂直极化波。该天线的中心工作频率为28GHz,总体尺寸为0.68λ0×0.68λ0×0.037λ0。仿真结果表明,该天线在27.14～29.31GHz范围内|S11|<-10dB,AR<3dB,完全覆盖了所需的27.5～28.35GHz频带。

In this paper, an omnidirectional circularly polarized antenna based on loop antenna-dipole pattern is designed for communications in 5G wireless systems. In order to achieve a more compact structure, a low-profile microstrip monopolar patch antenna is used to produce vertically polarized wave. The antenna works at 28 GHz and its overall size is 0.68λ0×0.68λ0×0.037λ0.Simulation results show that the designed antenna has a bandwidth from 27.14 to 29.31GHz(the common overlapped bandwidth limited by the-10dB |S11| and the 3dB axial ratio), which completely covers the 27.5 to 28.35 GHz band proposed for 5G cellular systems.