【作者】 朱华； 李秀萍； 张玲； 齐紫航；

【Author】 Zhu Hua;Li Xiuping;Zhang Ling;Qi Zihang;School of Electronic Engineering,Beijing University of Posts and Telecommunications;

【机构】 北京邮电大学电子工程学院；

【摘要】 本文提出了一款应用于C波段的宽带圆形天线阵以产生三个涡旋电磁波模态(l=-1,0,+1).该天线阵由2×2寄生贴片天线阵和三模馈电网络构成。三模馈电网络由四个耦合器级联形成的"十字形"结构以获得三种模态所需要的相位和幅度。该天线的-10 dB阻抗带宽为2.8 GHz(4～6.8 GHz),l=-1,0,1三种模态的增益分别为7.6 dBi、10 dBi、7.3 dBi。更多还原

【Abstract】 In this paper,a wideband circular array antenna is proposed for generating three modes(l=-1,0,+1) orbital angular momentum(OAM) beams at C-band.The proposed antenna consists of four 2×2 parasitic patch antenna arrays and three-mode feeding network.Three-mode feeding network is composed of four couplers formed cross-shaped,which achieves equi-amplitude and specific phases for generating three-mode OAM radio beams.Fabry-Perot cavity is designed to enhance gain of three-mode OAM antenna.The-10 dB impedance bandwidth is 2.8 GHz(4-6.8 GHz).The gain is 7.6 dBi,10 dBi,7.3 dBi for OAM mode l=-1,0,1,respectively.更多还原