Generation of Orbital Angular Momentum Beam With Circular Polarization Ceramic Antenna Array
Generation of Orbital Angular Momentum Beam With Circular Polarization Ceramic Antenna Array
复制标题
圆偏振陶瓷天线阵列产生轨道角动量束
DOI：
10.1109/jphot.2019.2899236
复制
发表时间：
2019-04-01
影响因子：
2.4
通讯作者：
Huang, Shanguo
中科院分区：
文献类型：
--
作者：
Bi, Ke;Xu, Jianchun;Huang, Shanguo
利用天线阵可以在多种微波频率产生轨道角动量波束。然而，系统的复杂性和无法远距离传输限制了OAM波束在无线电领域的应用。这里，采用了一种大大简化的全球定位系统(GPS)陶瓷天线阵列来产生OAM波束，而不需要相移器件的帮助。对GPS陶瓷天线阵的仿真验证了+/-1模式的OAM波束具有较小的发散角和非常标准的螺旋相位分布。为了测试该天线阵的传输能力，建立了一套能够检测OAM波束电磁特性一维空间分布的测量系统。即使考虑到电缆和功分器的巨大损耗，接收天线仍然可以在距离天线阵2m以上的地方接收到OAM波束的电磁特性。实验结果表明，采用所提出的陶瓷天线阵结构产生的OAM波束具有良好的性能。
Orbital angular momentum (OAM) beams can be generated at many microwave frequencies by using antenna array. However, the complexity of the system and inability to transmit over long distances limit the applications of OAM beams in the radio domain. Here, a significantly simplified global positioning system (GPS) ceramic antenna array is employed to generate OAM beams without the assistance of phase shifting devices. Simulation of the GPS ceramic antenna array verifies that the OAM beams with the mode of +/- 1 show small divergence angle and very standard spiral phase distribution. To test the transmission capability of the proposed antenna array, a measurement system that can detect the one-dimension spatial distribution of electromagnetic characteristic for the OAM beams is set up. Even considering the enormous loss in cables and power divider, the receiving antenna still can receive the electromagnetic characteristic of the OAM beams at a place more than 2 m away from the antenna array. Experimental results presented in this paper demonstrate the excellent performance of the OAM beams when generated with the proposed ceramic antenna array configuration.