亚波长等离子体增强小型化天线辐射实验研究
发布时间：2018-08-19 09:28
【摘要】：利用亚波长等离子体增强小型化天线辐射效应调控小型化天线的增益特性是一项尚处于起步阶段的创新性技术,对发展电子信息网络平台及微波通信、测控技术,高超声速飞行器通信、控制问题等国家重大战略需求具有重要的科学意义和应用价值。本论文利用亚波长等离子体结构对电磁辐射的增强效应,通过实验研究与数值模拟相结合,研究、掌握亚波长等离子体薄层对微波信号增强效应的关键技术,为研发等离子体小型化天线原理样机做技术准备。主要研究内容包括:亚波长等离子体增强小型化天线辐射仿真研究。为了设计实验工况,首先通过数值仿真方法研究电磁场空间分布特性,分析亚波长等离子体覆盖天线的近场、远场及信道特性,明确亚波长等离子体结构增强小型化天线的电磁波辐射特性及等离子体关键参数对微波信号增强效应的影响和作用规律,指导等离子体及天线实验参数范围设置,以获得辐射信号的有效增强;亚波长等离子体增强小型化天线辐射原理性实验研究。在亚波长等离子体覆盖层参数选取的基本原则指导下,设计并搭建亚波长等离子体增强小型化天线辐射实验平台,通过改变等离子体源的工作参数,考察不同频率下的天线辐射增益、回波损耗、信道等基本传输特性,调制并优化影响电磁波信号传输的关键等离子体参数,进而实现增强小型化天线辐射能力的有效改善;在此基础上,通过测量天线辐射增强特性,结合等离子体诊断数据和数值仿真结果,进一步建立天线辐射特性与等离子体参数之间对应关系,掌握亚波长等离子体结构调制增强小型化天线电磁辐射的工作特性,探究亚波长等离子体结构对电磁波信号的增强机制;亚波长等离子体增强小型化天线辐射平台自动化研究。针对传统的朗缪尔探针诊断系统在等离子体数据采集和数据分析处理过程中存在的问题,以及原理性实验平台无法对等离子体密度形成自动调控的不足,在原理性实验平台基础上进行自动化优化,设计能够自动监测等离子体温度,且能在一定范围内根据增益需求自动调控等离子体薄层内电子数密度的实验平台,为下一阶段研发具有一定自动化能力的亚波长等离子体调制增强小型化天线辐射原理样机做技术准备。本文最终设计的实验装置实现了利用亚波长等离子体对小型化天线电磁波辐射的增强作用,并能有效地提高实验效率,为开展亚波长等离子体增强小型化天线辐射原理样机研发提供了理论及实验依据。
[Abstract]:Using subwavelength plasma to enhance the radiation effect of miniaturized antenna is an innovative technology which is still in the initial stage to control the gain characteristics of the miniaturized antenna. It is important for the development of electronic information network platform, microwave communication, measurement and control technology. Hypersonic vehicle communication, control and other important national strategic needs have important scientific significance and application value. In this paper, we use the structure of subwavelength plasma to enhance the electromagnetic radiation. Through the combination of experimental research and numerical simulation, we can master the key technology of the enhancement effect of subwavelength plasma thin layer on microwave signal. Technical preparation for the development of plasma miniaturized antenna prototype. The main research contents include: the emulation of radiation of miniature antenna enhanced by subwavelength plasma. In order to design experimental conditions, the spatial distribution of electromagnetic field is studied by numerical simulation, and the near-field, far-field and channel characteristics of subwavelength plasma-covered antenna are analyzed. The characteristics of electromagnetic wave radiation of miniaturized antenna enhanced by subwavelength plasma structure and the influence and law of the key parameters of plasma on the enhancement effect of microwave signal are clarified, and the range of experimental parameters of plasma and antenna is guided. In order to obtain the effective enhancement of the radiation signal, the radiation principle of the miniaturized antenna enhanced by subwavelength plasma is studied experimentally. Under the guidance of the basic principle of selecting the parameters of the subwavelength plasma coating, a subwavelength plasma enhanced miniaturized antenna radiation experimental platform is designed and built. By changing the working parameters of the plasma source, The basic transmission characteristics such as antenna radiation gain, echo loss and channel are investigated at different frequencies, and the key plasma parameters which affect the transmission of electromagnetic signal are modulated and optimized so as to improve the radiation capacity of the miniature antenna effectively. On this basis, by measuring the radiation enhancement characteristics of the antenna, combining the plasma diagnostic data and the numerical simulation results, the corresponding relationship between the antenna radiation characteristics and the plasma parameters is further established. The working characteristics of electromagnetic radiation enhancement of miniaturized antenna by subwavelength plasma structure modulation are grasped, and the enhancement mechanism of electromagnetic wave signal by subwavelength plasma structure is explored, and the automation of radiation platform of subwavelength plasma enhanced miniaturized antenna is studied. In view of the problems existing in the traditional Langmuir probe diagnosis system in the process of plasma data acquisition and data analysis and processing, and the deficiency that the principle experimental platform can not automatically control the plasma density. Based on the principle experimental platform, the experimental platform is designed, which can automatically monitor the plasma temperature and adjust the electron number density in the plasma thin layer according to the gain requirement in a certain range. Technical preparations are made for the next stage to develop a prototype of subwavelength plasma modulation to enhance the radiation principle of miniaturized antenna. The experimental device designed in this paper has realized the enhancement of electromagnetic wave radiation of the miniaturized antenna by using subwavelength plasma, and can effectively improve the experimental efficiency. It provides a theoretical and experimental basis for the research and development of a prototype of the radiation principle of a miniature antenna enhanced by subwavelength plasma.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820
本文编号：2191250
[Abstract]:Using subwavelength plasma to enhance the radiation effect of miniaturized antenna is an innovative technology which is still in the initial stage to control the gain characteristics of the miniaturized antenna. It is important for the development of electronic information network platform, microwave communication, measurement and control technology. Hypersonic vehicle communication, control and other important national strategic needs have important scientific significance and application value. In this paper, we use the structure of subwavelength plasma to enhance the electromagnetic radiation. Through the combination of experimental research and numerical simulation, we can master the key technology of the enhancement effect of subwavelength plasma thin layer on microwave signal. Technical preparation for the development of plasma miniaturized antenna prototype. The main research contents include: the emulation of radiation of miniature antenna enhanced by subwavelength plasma. In order to design experimental conditions, the spatial distribution of electromagnetic field is studied by numerical simulation, and the near-field, far-field and channel characteristics of subwavelength plasma-covered antenna are analyzed. The characteristics of electromagnetic wave radiation of miniaturized antenna enhanced by subwavelength plasma structure and the influence and law of the key parameters of plasma on the enhancement effect of microwave signal are clarified, and the range of experimental parameters of plasma and antenna is guided. In order to obtain the effective enhancement of the radiation signal, the radiation principle of the miniaturized antenna enhanced by subwavelength plasma is studied experimentally. Under the guidance of the basic principle of selecting the parameters of the subwavelength plasma coating, a subwavelength plasma enhanced miniaturized antenna radiation experimental platform is designed and built. By changing the working parameters of the plasma source, The basic transmission characteristics such as antenna radiation gain, echo loss and channel are investigated at different frequencies, and the key plasma parameters which affect the transmission of electromagnetic signal are modulated and optimized so as to improve the radiation capacity of the miniature antenna effectively. On this basis, by measuring the radiation enhancement characteristics of the antenna, combining the plasma diagnostic data and the numerical simulation results, the corresponding relationship between the antenna radiation characteristics and the plasma parameters is further established. The working characteristics of electromagnetic radiation enhancement of miniaturized antenna by subwavelength plasma structure modulation are grasped, and the enhancement mechanism of electromagnetic wave signal by subwavelength plasma structure is explored, and the automation of radiation platform of subwavelength plasma enhanced miniaturized antenna is studied. In view of the problems existing in the traditional Langmuir probe diagnosis system in the process of plasma data acquisition and data analysis and processing, and the deficiency that the principle experimental platform can not automatically control the plasma density. Based on the principle experimental platform, the experimental platform is designed, which can automatically monitor the plasma temperature and adjust the electron number density in the plasma thin layer according to the gain requirement in a certain range. Technical preparations are made for the next stage to develop a prototype of subwavelength plasma modulation to enhance the radiation principle of miniaturized antenna. The experimental device designed in this paper has realized the enhancement of electromagnetic wave radiation of the miniaturized antenna by using subwavelength plasma, and can effectively improve the experimental efficiency. It provides a theoretical and experimental basis for the research and development of a prototype of the radiation principle of a miniature antenna enhanced by subwavelength plasma.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820
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