【摘要】：近年來,由于表面波天線具有低剖面、空氣阻力小等特點而易于安裝在各種飛行器表面上,這引起了研究人員的廣泛興趣。本文研究了對表面波的精確控制和表面波天線的設(shè)計,主要分為以下幾個部分:1.首先本文對表面波的基本原理進行了簡單的介紹,在此基礎(chǔ)上以經(jīng)典的介質(zhì)棒表面波天線和梳狀表面波天線為例分析了表面波天線的設(shè)計原理,并且對這兩種經(jīng)典的表面波天線進行了仿真驗證,在仿真結(jié)果的基礎(chǔ)上分析了表面波天線的結(jié)構(gòu)參數(shù)和輻射特性。此外還指出了兩種經(jīng)典表面波天線在設(shè)計功能上的局限性。2.其次本文介紹了變換光學(xué)的發(fā)展和基本原理,并以電磁隱身斗篷的設(shè)計原理與仿真分析了變換光學(xué)原理電磁波控制中的應(yīng)用。給出了介質(zhì)表面上覆蓋地毯隱身衣進行表面波控制的基本原理。并在分析變換光學(xué)在表面波控制中的基本原理的基礎(chǔ)上介紹了兩種在微波頻段中利用變換光學(xué)的基本原理對表面波進行精確控制的場景。3.最后本文對傳統(tǒng)雙曲柱面透鏡天線進行了分析介紹,并在此基礎(chǔ)上引入了表面波雙曲透鏡天線以提高表面波天線的增益。提出了一種新型的表面波透鏡天線,將對表面波在介質(zhì)表面的精確控制理論應(yīng)用到表面波天線的設(shè)計中,在表面波天線的介質(zhì)導(dǎo)波面上嵌入一種新型的變換透鏡以提升表面波天線的方向性和輻射增益,這種新型透鏡是利用準保角光學(xué)變換將傳統(tǒng)的雙曲透鏡壓縮成一個平透鏡來得到的。之后本文還介紹了等效參數(shù)提取理論,在此基礎(chǔ)上提出了一種利用在介質(zhì)板上穿孔來合成需要的介電常數(shù)的可行方法以實現(xiàn)這種新型的變換平透鏡。電磁仿真結(jié)果表明,這種新型表面波透鏡天線可以在保持原有的低剖面的同時大大的提高方向性。
[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.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN820

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