本文選題：變換光學　切入點：逆變換光學　出處：《北京交通大學》2017年碩士論文

【摘要】：變換光學的提出為人工電磁材料與電磁波的自由調(diào)控之間架起了一座橋梁。變換光學通過坐標變換,對變換媒質(zhì)的材料參數(shù)進行設計,從而使得通過變換媒質(zhì)的電磁波可以按照人們設想的方式進行傳播。借助其可以自由調(diào)控電磁波的顯著優(yōu)點,變換光學與天線設計的交叉研究也逐漸成為了熱點。本文從變換光學的基本概念出發(fā),結(jié)合其相關(guān)的延伸理論,并以人工電磁材料作為最終的實現(xiàn)手段,對變換光學在天線設計領域中的應用進行了相關(guān)的理論分析與仿真驗證,具有一定的理論意義與應用前景。本文的主要研究內(nèi)容與創(chuàng)新點如下:1.研究了變換光學理論條件下阻抗邊界條件的處理方法與應用。理論推導出了共形變換下阻抗邊界條件在變換前后應遵循的變換形式,并通過仿真進行了驗證。2.以天線應用為背景,提出了逆變換光學的設計思路,實現(xiàn)了傳播波到表面波的轉(zhuǎn)化表面以及多波束生成表面的設計。針對傳播波到表面波轉(zhuǎn)化表面的設計進行了深入和細致的研究,分析了坐標變換方式以及厚度的不同對其輻射特性的影響。3.基于逆變換光學理論,設計出了一種新型的多波束雙極化轉(zhuǎn)換表面,并對結(jié)構(gòu)參數(shù)進行了合理的近似和有效的簡化,最終通過緊湊的多層人工電磁表面結(jié)構(gòu)予以實現(xiàn)。本文研究表明,以變換光學為理論指導,以人工電磁材料為物質(zhì)基礎的創(chuàng)新研究將為天線輻射特性的靈活且有效調(diào)控帶來新的思路和途徑,相關(guān)交叉學科研究領域蘊藏著巨大的科研潛力。
[Abstract]:A bridge between artificial electromagnetic material and the free control of electromagnetic wave is put up in the paper. The material parameters of the transformed medium are designed by the transformation optics through coordinate transformation. So that the electromagnetic waves through the transformed medium can be propagated in the way that people imagine, and with the help of their remarkable advantages of being able to freely control the electromagnetic waves, The cross study of transform optics and antenna design has gradually become a hot topic. This paper starts from the basic concept of transform optics, combines its related extension theory, and takes artificial electromagnetic material as the final means of realization. The application of transform optics in antenna design is analyzed and simulated. The main contents and innovations of this paper are as follows: 1. The method and application of impedance boundary condition under the theory of transformational optics are studied. The co-deformed commutative resistance is derived theoretically. The transformation form that the anti-boundary condition should follow before and after the transformation, Based on the application of antenna, the design idea of inverse transform optics is put forward. The conversion surface from propagating wave to surface wave and the design of multi-beam generating surface are realized. The design of the transformed surface from propagating wave to surface wave is studied deeply and meticulously. The influence of coordinate transformation mode and thickness on the radiation characteristics is analyzed. Based on the inverse transform optical theory, a new multi-beam dual-polarization conversion surface is designed, and the structural parameters are reasonably approximated and effectively simplified. Finally, it is realized by compact multilayer artificial electromagnetic surface structure. The innovative research based on artificial electromagnetic materials will bring new ideas and approaches to the flexible and effective regulation of antenna radiation characteristics.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN820

【參考文獻】

相關(guān)博士學位論文 前1條

1 陳煥陽;各向異性材料中的波：隱身衣、旋轉(zhuǎn)衣和聲子晶體[D];上海交通大學;2008年

，

本文編號：1676128