用于一种新型近场通信系统的天线设计
发布时间：2018-12-10 09:55
【摘要】：本文研究采用轨道角动量相位模式进行信道复用的菲涅尔辐射近场无线通信系统,着重研究用于该系统的天线设计。根据本课题组已有的研究结果,说明了携带多阶轨道角动量的波束不同相位模式之间的正交性用于信道复用的原理,以环形阵列天线为例,阐述了系统信道矩阵及复用/解复用的过程。文章中设计了一种环形槽反射面天线用于产生不同阶的轨道角动量模式,该天线对比传统的抛物面天线和无反射面的偶极子天线阵列,对于电磁波数的能量聚焦具有较好的性能,所有的轨道角动量模式下,主波束的增益有明显提高。针对阵列天线系统,设计并制作了一种移相器。结合近年来新兴的超表面人工电磁材料,本文设计了不同的次波长单元结构,该结构构成的二维周期平面对入射的电磁波的反射波的相位可以进行超过360°范围的调控,并且保证幅度、极化的一致。将该结构用于一种线极化的反射阵列天线,给出了用于产生不同阶轨道角动量的控制相位表达式,设计出反射阵天线,采用全波电磁仿真软件对设计的天线进行了分析。针对上述反射阵天线的不足,文章中提出了采用超表面设计的表面波—OAM模式转换圆形阵列天线。推导了该阵列产生轨道角动量的原理及表达式,给出了采用上述超表面单元用于产生不同阶的轨道角动量波束应调控的相位的表达式,设计并制作了可以产生多个不同阶轨道角动量的阵列天线,通过理论推导、数值仿真和实验测试,给出了该天线的参数,仿真和实验结果表现出较好的一致性,达到了设计的预期。
[Abstract]:In this paper, a Fresnel radiative near field wireless communication system using orbital angular momentum phase mode for channel multiplexing is studied, with emphasis on the antenna design for the system. Based on the existing research results of our group, the principle that the orthogonality between different phase modes of beams carrying multi-order orbital angular momentum is used for channel multiplexing is explained. The annular array antenna is taken as an example. The system channel matrix and the process of multiplexing / demultiplexing are described. In this paper, an annular slot reflector antenna is designed to generate different orbital angular momentum modes. The antenna pair is compared with the traditional parabolic antenna and the non-reflective surface dipole antenna array. For the energy focusing of electromagnetic wave number, the gain of the main beam is improved obviously in all orbital angular momentum modes. A phase shifter is designed and fabricated for array antenna system. Combined with the newly developed supersurface artificial electromagnetic materials, different subwavelength unit structures are designed in this paper. The phase of the reflected waves of the incident electromagnetic waves can be adjusted by the two-dimensional periodic plane of the structure in a range of more than 360 掳. And to ensure the amplitude, polarization consistent. The structure is applied to a linearly polarized reflector array antenna. The control phase expression for different order orbital angular momentum is given and the reflector array antenna is designed. The designed antenna is analyzed by the full wave electromagnetic simulation software. In order to overcome the shortcomings of the above antenna, a surface-wave-OAM mode converted circular array antenna is proposed in this paper. The principle and expression of orbital angular momentum generated by the array are derived, and the expression of the phase to be controlled by the supersurface element mentioned above is given, which is used to generate different order orbital angular momentum beams. An array antenna with different order orbital angular momentum is designed and fabricated. The parameters of the antenna are obtained by theoretical derivation, numerical simulation and experimental test. The results of simulation and experiment show good agreement. Meet the design expectations.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820
，
本文编号：2370386
[Abstract]:In this paper, a Fresnel radiative near field wireless communication system using orbital angular momentum phase mode for channel multiplexing is studied, with emphasis on the antenna design for the system. Based on the existing research results of our group, the principle that the orthogonality between different phase modes of beams carrying multi-order orbital angular momentum is used for channel multiplexing is explained. The annular array antenna is taken as an example. The system channel matrix and the process of multiplexing / demultiplexing are described. In this paper, an annular slot reflector antenna is designed to generate different orbital angular momentum modes. The antenna pair is compared with the traditional parabolic antenna and the non-reflective surface dipole antenna array. For the energy focusing of electromagnetic wave number, the gain of the main beam is improved obviously in all orbital angular momentum modes. A phase shifter is designed and fabricated for array antenna system. Combined with the newly developed supersurface artificial electromagnetic materials, different subwavelength unit structures are designed in this paper. The phase of the reflected waves of the incident electromagnetic waves can be adjusted by the two-dimensional periodic plane of the structure in a range of more than 360 掳. And to ensure the amplitude, polarization consistent. The structure is applied to a linearly polarized reflector array antenna. The control phase expression for different order orbital angular momentum is given and the reflector array antenna is designed. The designed antenna is analyzed by the full wave electromagnetic simulation software. In order to overcome the shortcomings of the above antenna, a surface-wave-OAM mode converted circular array antenna is proposed in this paper. The principle and expression of orbital angular momentum generated by the array are derived, and the expression of the phase to be controlled by the supersurface element mentioned above is given, which is used to generate different order orbital angular momentum beams. An array antenna with different order orbital angular momentum is designed and fabricated. The parameters of the antenna are obtained by theoretical derivation, numerical simulation and experimental test. The results of simulation and experiment show good agreement. Meet the design expectations.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820
，
本文编号：2370386
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