基于蝶形振子的涡旋电磁波天线阵列设计  

Design of Vortex Electromagnetic Wave Array based on Bow-Tie Antenna

作　　者：吴杰[1] 刘运林[1] WU Jie;LIU Yunlin(Southwest Jiaotong University,Chengdu Sichuan 611756,China)

机构地区：[1]西南交通大学,四川成都611756

出　　处：《通信技术》2021年第6期1502-1508,共7页Communications Technology

摘　　要：基于均匀圆形阵列(Uniform Circular Array,UCA)产生涡旋电磁波的原理,提出一种以变形蝶形振子为阵元的八元涡旋电磁波阵列的设计。通过给阵元馈以等幅等相位差的激励信号,阵列能够辐射出涡旋电磁波,且通过改变阵元间激励信号的等相位差值,改变涡旋电磁波的模态数,能够为日益拥挤的频谱利用带来新的频率复用方式。仿真结果表明:天线阵列的-10 dB阻抗带宽(l=1时)为9.62~10.46 GHz(8.4%),带宽性能良好;各模态中电磁波波前相位均呈现清晰的螺旋结构,相位分布稳定;不同模态下阵列的最大增益均达9.5 dB以上,增益性能良好。Based on the principle of generating vortex electromagnetic waves from a UCA(Uniform Circular Array),this paper designs an eight-element vortex electromagnetic wave array with a deformed bow-tie antenna as array element.By feeding the array elements with excitation signals of equal amplitude and phase difference,the array can radiate vortex electromagnetic waves,and by changing the phase difference of the excitation signals between the array elements,the number of modes of the vortex electromagnetic waves can be changed,which can bring a new frequency reuse method to the increasingly crowded spectrum utilization.The simulation results indicate that the-10 dB impedance bandwidth of the antenna array is 9.62~10.46 GHz(8.4%);the wavefront phase of the electromagnetic wave in each mode presents a corresponding clear spiral structure,and the phase distribution is stable;the maximum gain of the array in different modes is above 9.5 dB,and the gain performance is good.

关 键 词：涡旋电磁波 轨道角动量 均匀圆形阵列(UCA) 蝶形振子 微带天线 

分 类 号：TN822[电子电信—信息与通信工程]