新型表面波天线的设计

发布时间：2019-04-24 22:23

【摘要】：近年来,由于表面波天线具有低剖面、空气阻力小等特点而易于安装在各种飞行器表面上,这引起了研究人员的广泛兴趣。本文研究了对表面波的精确控制和表面波天线的设计,主要分为以下几个部分:1.首先本文对表面波的基本原理进行了简单的介绍,在此基础上以经典的介质棒表面波天线和梳状表面波天线为例分析了表面波天线的设计原理,并且对这两种经典的表面波天线进行了仿真验证,在仿真结果的基础上分析了表面波天线的结构参数和辐射特性。此外还指出了两种经典表面波天线在设计功能上的局限性。2.其次本文介绍了变换光学的发展和基本原理,并以电磁隐身斗篷的设计原理与仿真分析了变换光学原理电磁波控制中的应用。给出了介质表面上覆盖地毯隐身衣进行表面波控制的基本原理。并在分析变换光学在表面波控制中的基本原理的基础上介绍了两种在微波频段中利用变换光学的基本原理对表面波进行精确控制的场景。3.最后本文对传统双曲柱面透镜天线进行了分析介绍,并在此基础上引入了表面波双曲透镜天线以提高表面波天线的增益。提出了一种新型的表面波透镜天线,将对表面波在介质表面的精确控制理论应用到表面波天线的设计中,在表面波天线的介质导波面上嵌入一种新型的变换透镜以提升表面波天线的方向性和辐射增益,这种新型透镜是利用准保角光学变换将传统的双曲透镜压缩成一个平透镜来得到的。之后本文还介绍了等效参数提取理论,在此基础上提出了一种利用在介质板上穿孔来合成需要的介电常数的可行方法以实现这种新型的变换平透镜。电磁仿真结果表明,这种新型表面波透镜天线可以在保持原有的低剖面的同时大大的提高方向性。
[Abstract]:In recent years, the surface wave antenna is easy to be installed on the surface of various aircraft because of its low profile and low air resistance, which has aroused wide interest of researchers. In this paper, the precise control of surface wave and the design of surface wave antenna are studied, which are divided into the following parts: 1. Firstly, the basic principle of surface wave is introduced in this paper. On the basis of this, the design principle of surface wave antenna is analyzed by taking the classic dielectric rod surface wave antenna and comb surface wave antenna as examples. The two classical surface wave antennas are simulated and verified. Based on the simulation results, the structural parameters and radiation characteristics of the surface wave antennas are analyzed. In addition, the limitations of two classical surface wave antennas in design function are also pointed out. 2. Secondly, this paper introduces the development and basic principle of transformation optics, and analyzes the application of electromagnetic wave control based on the design principle and simulation of electromagnetic stealth cloak. The basic principle of surface wave control with carpet coverings on the dielectric surface is given. Based on the analysis of the basic principle of the transformation optics in the control of the surface wave, two kinds of scenes which use the basic principle of the transformation optics to control the surface wave precisely in the microwave frequency band are introduced in this paper. 3. Finally, the traditional hyperbolic cylindrical lens antenna is analyzed and introduced, and the surface wave hyperbolic lens antenna is introduced to improve the gain of the surface wave antenna. A new type of surface wave lens antenna is proposed. The precise control theory of surface wave on the dielectric surface is applied to the design of surface wave antenna. A new type of transformation lens is embedded in the dielectric waveguide surface of the surface wave antenna to improve the directivity and radiation gain of the surface wave antenna. The new lens is obtained by compressing the traditional hyperbolic lens into a flat lens by using quasi-conformal optical transformation. After that, the theory of equivalent parameter extraction is introduced, and a feasible method to synthesize the required dielectric constant by perforating the dielectric plate is proposed to realize this new type of transformation flat lens. The electromagnetic simulation results show that the new surface wave lens antenna can greatly improve the directivity while maintaining the original low profile.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN820

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