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一种双频双模式涡旋微带阵列天线的设计
Design of a Dual-Frequency and Dual-Mode Vortex Microstrip Array Antenna

DOI: 10.12677/HJWC.2019.94017, PP. 139-146

Keywords: 轨道角动量，圆形贴片，微带阵列天线，开槽，双频，双模式
Orbital Angular Momentum, Circular Patch, Microstrip Array Antenna, Slot, Dual Frequency, Dual Mode

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Abstract:

为进一步提升通信容量和频谱利用率，以频分复用理论为基础提出了一种双频双模式涡旋微带阵列天线的设计方案。天线以矩形开槽的圆形微带贴片为单元，将8个结构相同的阵元通过馈电网络连接分布在一个同心圆面上。结合三维电磁场仿真软件建模、优化单元贴片及馈线尺寸确定了天线最优结构并制作了实物。结果表明，在中心频率分别为7.3 GHz和8.5 GHz时，微带阵列天线获得了良好的阻抗匹配。同时发现，阵列天线在不同谐振点处产生的螺旋状电磁波旋向相反。该设计为实现双频微带阵列天线产生不同模式的涡旋电磁波提供了设计思路。
In order to improve communication capacity and spectrum utilization, a design scheme of dual- frequency and dual-mode vortex microstrip array antenna is proposed based on frequency division multiplexing theory. The antenna is composed of circular microstrip patches with rectangular grooves, and 8 arrays with the same structure are distributed in a concentric circle through the feed network. The optimal structure of the antenna is determined and a real object is made by combining 3D electromagnetic field simulation software modeling, optimization unit patch and feed size. The results show that the microstrip array antenna has good impedance matching when the center frequency is 7.3 GHz and 8.5 GHz respectively. At the same time, it is found that the spiral electromagnetic waves generated by the array antenna at different resonance points rotate in opposite directions. This design provides a design idea for dual-frequency microstrip array antenna to generate different modes of vortex electromagnetic waves.

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