基于射频轨道角动量波束的旋转多普勒频移
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- 英文论文题名：Rotational Doppler Frequency Shift Based on the Radio Frequency Orbital Angular Momentum Wave
- 论文作者：郑佳瑜 ; 郑史烈 ; 邵振雷 ; 章献民
- 英文论文作者：ZHENG Jiayu ; ZHENG Shilie ; SHAO Zhenlei ; ZHANG Xianmin ; College of Information Science and Electronic Engineering ; Zhejiang University
- 年：2017
- 作者机构：浙江大学信息与电子工程学院;
- 论文关键词：射频轨道角动量波束 ; 环形行波缝隙天线 ; 旋转多普勒效应
- 英文论文关键词：the radio frequency orbital angular momentum wave ; traveling-wave circular slot antenna ; rotational Doppler frequency shift
- 会议召开时间：2017-05-08
- 会议录名称：2017年全国微波毫米波会议论文集（中册）
- 英文会议录名称：Proceedings of 2017 National Conference on Microwave and Millimeter Waves(NCMMW2017)
- 语种：中文
- 分类号：TN823.24
- 学会代码：ZDWB
- 会议名称：2017年全国微波毫米波会议
- 会议地点：中国浙江杭州
- 主办单位：中国电子学会
- 学会名称：中国电子学会微波分会
- 页数：4
- 文件大小：1103k
- 原文格式：D
- 会议级别：全国
摘要
射频轨道角动量波束具有螺旋相位波前,照射到旋转物体上可以产生与拓扑荷以及转速成正比的旋转多普勒频移。本文用环形行波缝隙天线产生10GHz轨道角动量波束,照射到金属旋转物体上,并用频谱分析仪分析回波频谱,实验证明了射频轨道角动量波束的旋转多普勒效应。实验采用拓扑荷为1、2、3、6的射频轨道角动量波束,旋转多普勒频移与轨道角动量波束拓扑荷成正比,其放大作用有利于较好地测量微小转速。
The radio frequency orbital angular momentum(OAM) wave has the twist phase front, which can induce the rotational Doppler frequency shift when the OAM wave is illuminating on the spinning object. In the paper, we experimentally prove the radio frequency rotational Doppler effect with the radio frequency OAM wave generated by the traveling-wave circular slot antenna. In the experiment, we use the OAM waves with different topological charge(1, 2, 3, 6). And the rotational Doppler frequency shift is proportional to the topological charge of the OAM wave and the rotating speed of the object. The multiplicative rotational frequency shift may have applications in measuring the tiny rotating speed and the remote sensing.
The radio frequency orbital angular momentum(OAM) wave has the twist phase front, which can induce the rotational Doppler frequency shift when the OAM wave is illuminating on the spinning object. In the paper, we experimentally prove the radio frequency rotational Doppler effect with the radio frequency OAM wave generated by the traveling-wave circular slot antenna. In the experiment, we use the OAM waves with different topological charge(1, 2, 3, 6). And the rotational Doppler frequency shift is proportional to the topological charge of the OAM wave and the rotating speed of the object. The multiplicative rotational frequency shift may have applications in measuring the tiny rotating speed and the remote sensing.
引文
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2 .Meynart R.Instantaneous velocity field measurements in unsteady gas flow by speckle velocimetry[J].Applied Optics,1983,22(4):535-540.
3 .Allen L,Beijersbergen M W,Spreeuw R J C,et al.Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes[J].Physical Review A,1992,45(11):8185.
4 .Lavery M P J,Speirits F C,Barnett S M,et al.Detection of a spinning object using light’s orbital angular momentum[J].Science,2013,341(6145):537-540.
5 .Lavery M P J,Barnett S M,Speirits F C,et al.Observation of the rotational Doppler shift of a white-light,orbital-angular-momentum-carrying beam backscattered from a rotating body[J].Optica,2014,1(1):1-4.
6 .Zhao M,Gao X,Xie M,et al.Measurement of the rotational Doppler frequency shift of a spinning object using a radio frequency orbital angular momentum beam[J].Optics letters,2016,41(11):2549-2552.
7 .Chen V C,Li F,Ho S S,et al.Micro-Doppler effect in radar:phenomenon,model,and simulation study[J].IEEE Transactions on Aerospace and electronic systems,2006,42(1):2-21.