模态波束双可重构OAM发生器的研究
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摘要
针对圆环形阵列天线产生轨道角动量(orbital angular momentum,OAM)涡旋波的技术,提出了宽带圆极化单臂螺旋天线(single-arm spiral antenna,SASA)构成的机械可重构圆环形阵列天线,并深入研究了OAM涡旋波的模态检测和收发情况.利用SASA的相位特性,调控各阵元绕自身轴线的旋转角度,可灵活控制OAM涡旋波的主波束辐射方向.该设计可实现OAM模态和涡旋波辐射方向双可重构调控特性,并根据SASA的旋转角方向实现左旋圆极化或右旋圆极化OAM涡旋波.实验加工并测试了该可重构圆环形OAM阵列天线,验证了该思想和方法的正确性和有效性.
The mode detection and transmission of the orbital angular momentum vortex wave are studied intensively on the basis of the proposed mechanically reconfigurable circular array antenna which consists of broadband and circular polarization single-arm spiral antenna(SASA)allowing self-rotation around the axis to produce a relative change in phase of the radiated field in space.Furthermore,the main beam direction of the orbital angular momentum(OAM)vortex wave can be flexibly controlled by adjusting the rotation angle of each array element around its axis according to the phase characteristics of the SASA.The proposed design can realize the vortex beam direction and OAM mode reconfigurability.In addition,the left-hand circular polarization or right-hand circular polarization vortex wave can be adjusted by changing the rotation angle of the SASA.The prototype of the circular array is proposed,fabricated,and measured to validate the effectiveness and correctness of the proposed method.
The mode detection and transmission of the orbital angular momentum vortex wave are studied intensively on the basis of the proposed mechanically reconfigurable circular array antenna which consists of broadband and circular polarization single-arm spiral antenna(SASA)allowing self-rotation around the axis to produce a relative change in phase of the radiated field in space.Furthermore,the main beam direction of the orbital angular momentum(OAM)vortex wave can be flexibly controlled by adjusting the rotation angle of each array element around its axis according to the phase characteristics of the SASA.The proposed design can realize the vortex beam direction and OAM mode reconfigurability.In addition,the left-hand circular polarization or right-hand circular polarization vortex wave can be adjusted by changing the rotation angle of the SASA.The prototype of the circular array is proposed,fabricated,and measured to validate the effectiveness and correctness of the proposed method.
引文
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[21]XIONG F,ROMANOFSKY R R.Study of behavior of digital modulations for beam steerable reflectarray antennas[J].IEEE transactions on antennas&propagation,2005,53(3):1083-1097.
[2]POYNTING J H.The wave motion of a revolving shaft,and a suggestion as to the angular momentum in a beam of circularly polarised light[J].Proceedings of the Royal Society of London,1909,82(557):560-567.
[3]BETH R A.Mechanical detection and measurement of the angular momentum of light[J].Physical review,1936,50(2):115-125.
[4]ALLEN L,BEIJERSBERGEN M W,SPREEUW R J,et al.Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes[J].Physical review A atomic molecular&optical physics,1992,45(11):8185.
[5]GIBSON G,COURTIAL J,VASNETSOV M,et al.Free-space information transfer using light beams carrying orbital angular momentum[J].Optics express,2004,12(22):5448-5456.
[6]YU S,LI L,SHI G,et al.Design,fabrication,and measurement of reflective metasurface for orbital angular momentum vortex wave in radio frequency domain[J].Applied physics letters,2016,108(12):5448.
[7]YU S,LI L,SHI G,et al.Generating multiple orbital angular momentum vortex beams using a metasurface in radio frequency domain[J].Applied physics letters,2016,108(24):662.
[8]YU S,LI L,SHI G.Dual-polarization and dual-mode orbital angular momentum radio vortex beam generated by using reflective metasurface[J].Applied physics express,2016,9(8):082202.
[9]MOHAMMADI S M,DALDORFF L K S,BERGMAN J E S,et al.Orbital angular momentum in radio—a system study[J].IEEE transactions on antennas&propagation,2010,58(2):565-572.
[10]MOHAMMADI S M,DALDORFF L K S,BERGMAN J E S,et al.Orbital angular momentum in radio—a system study[J].IEEE transactions on antennas&propagation,2010,58(2):565-572.
[11]LI L,ZHOU X.Mechanically reconfgurable singlearm spiral antenna array for generation of broadband circularly polarized orbital angular momentum vortex waves[J].Scientific reports,2018,8:5128.
[12]何猛.超宽带微波功分器的研制[D].成都:电子科技大学,2009.HE M.Research on ultra wideband microwave power divider[D].Chengdu:University of Electronic Science and Technology,2009.(in Chinese)
[13]袁小聪,贾平,雷霆,等.光学旋涡与轨道角动量光通信[J].深圳大学学报(理工版),2014,31(4):331-346.YUAN X C,JIA P,LEI T,et al.Optical vortex and orbital angular momentum optical communication[J].Journal of Shenzhen University(science and technology edition),2014,31(4):331-346.(in Chinese)
[14]TAMBURINI F,MARI E,SPONSELLI A,et al.Encoding many channels in the same frequency through radio vorticity:first experimental test[J].New journal of physics,2011,14(3):811-815.
[15]TAMBURINI F,MARI E,PARISI G,et al.Tripling the capacity of a point-to-point radio link by using electromagnetic vortices[J].Radio science,2016,50(6):501-508.
[16]李永久.宽带平面反射阵和多层频率选择表面研究及其应用[D].西安:西安电子科技大学,2015.LI Y J.Research and application on broadband planar reflector and multilayer frequency selective surface[D].Xi’an:Xidian University,2015.(in Chinese)
[17]POZAR D M,TARGONSKI S D,POKULS R.A shaped-beam microstrip patch reflectarray[J].IEEE transactions on antennas and propagation,1999,47(7):1167-1173.
[18]CHANG D C,HUANG M C.Feasibility study of erecting cosecant squared pattern by planar microstrip reflectarray antenna[C]//Asia-Pacific Microwave Conference,1993,1993,2:20-24.
[19]ENCINAR J A,ZORNOZA J A.Three-layer printed reflectarrays for contoured beam space applications[J].IEEE transactions on antennas and propagtion,2004,52(5):1138-1148.
[20]ZORNOZA J A,LEBERER R,ENCINAR J A,et al.Folded multilayer microstrip reflectarray with shaped pattern[J].IEEE transactions on antennas&propagation,2006,54(2):510-518.
[21]XIONG F,ROMANOFSKY R R.Study of behavior of digital modulations for beam steerable reflectarray antennas[J].IEEE transactions on antennas&propagation,2005,53(3):1083-1097.