一种基于S波段缝隙贴片的双频涡旋波天线

A Dual-band Vortex Wave Antenna Based on the S-band Slot Patch

随着5G等新一代通信技术的迅速发展,对信道容量和频谱利用效率的需求越来越高。以双频天线为阵元进行组阵,将同时在两个谐振频率处产生OAM波束,大大提高了频谱的利用率。本文提出一种基于S波段缝隙贴片的双频涡旋波天线。其由八个阵元以60mm为半径均匀排列,阵元为切角U型槽天线,采用同轴馈电。通过调节该双频涡旋波天线各阵元的馈电相位,实现了在2.7 GHz和3.7 GHz处同时产生七种不同模态的OAM波束。仿真结果显示:其在低频处|S11|<-10dB的回波损耗带宽为0.24 GHz(2.57~2.81 GHz),高频处为0.25 GHz(3.57~3.82 GHz)。双频带内隔离度均大于23dB。本天线可以进一步提高雷达系统的分辨率。

With the rapid development of new generation communication technologies such as 5G,the demand for channel capacity and spectrum utilization efficiency is increasing.By using dual-frequency antennas as array elements,OAM(Orbital Angular Momentum)beams can be generated simultaneously at two resonant frequencies,greatly improving spectrum utilization.This paper proposes a dual-band vortex wave antenna based on the S-band slot patch.It consists of eight elements uniformly arranged with a radius of 60mm.The elements are U-shaped slot antennas with coaxial feeding.By adjusting the feeding phase of each element in the dual-frequency vortex wave antenna,seven different modal OAM beams can be generated simultaneously at 2.7 GHz and 3.7 GHz.Simulation results show that the return loss bandwidth with|S11|<-10dB at low frequency is 0.24 GHz(2.57~2.81GHz),and at high frequency is 0.25 GHz(3.57~3.82 GHz).with isolation greater than 23 dB within the dual-frequency band.This antenna can further enhance the resolution of the radar system.