基于時(shí)間反演的電磁波傳播控制算法研究
[Abstract]:With the development of wireless technology, the application of electromagnetic wave in daily life is increasing. Besides wireless communication, remote sensing, target tracking and other traditional applications, in recent years, electromagnetic wave has also been applied in medical treatment, industry and agriculture, and some basic disciplines. These are closely related to electromagnetic wave propagation control. Electromagnetic wave propagation control has always been a subject of great concern in the field of electromagnetism, among which, how to effectively control the electromagnetic wave space field to achieve the expected purpose of application has become a key problem. Electromagnetic wave propagation control methods mainly include antenna and antenna array technology, metamaterial technology, time inversion technology. Antenna and antenna array technology can only control the far-field pattern, and the complex optimization process of antenna array technology is needed to solve the problem of special spatial field control. The technology of metamaterials is limited by the principle of work, it can only control the propagation of narrow-band electromagnetic wave, and the structure design is not flexible and universal. Time inversion technology can easily control the spatial field of broadband electromagnetic wave by using the space-time focusing characteristic and adaptive transmission ability of time inversion electromagnetic wave. Therefore, this paper will study the control algorithm of electromagnetic wave space field based on time inversion technology. The main contents are as follows: firstly, through the theoretical analysis of the uniqueness theorem of electromagnetic field and the space-time focusing characteristic of time inversion electromagnetic wave, This paper introduces a control method of wide band electromagnetic wave space field. Secondly, based on the above principle, a control algorithm of electromagnetic wave spatial field distribution based on Green's function is proposed, and the influence factors of single point focusing field are analyzed by using this algorithm. Furthermore, the focused field control with linear and uniform distribution is realized by simulation. Finally, on the basis of time inversion technology, a focus motion control algorithm of electromagnetic wave focusing field is proposed. The effectiveness of the algorithm is verified by numerical simulation in free space and semi-closed metal cavity, respectively. The accuracy of the method is analyzed by the simulation results, and the realizability of the algorithm is further verified by the experiments of the latter.
【學(xué)位授予單位】:電子科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TN011
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