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

【摘要】：變換光學(xué)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(xué)通過坐標(biāo)變換,對(duì)變換媒質(zhì)的材料參數(shù)進(jìn)行設(shè)計(jì),從而使得通過變換媒質(zhì)的電磁波可以按照人們?cè)O(shè)想的方式進(jìn)行傳播。借助其可以自由調(diào)控電磁波的顯著優(yōu)點(diǎn),變換光學(xué)與天線設(shè)計(jì)的交叉研究也逐漸成為了熱點(diǎn)。本文從變換光學(xué)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(shí)現(xiàn)手段,對(duì)變換光學(xué)在天線設(shè)計(jì)領(lǐng)域中的應(yīng)用進(jìn)行了相關(guān)的理論分析與仿真驗(yàn)證,具有一定的理論意義與應(yīng)用前景。本文的主要研究?jī)?nèi)容與創(chuàng)新點(diǎn)如下:1.研究了變換光學(xué)理論條件下阻抗邊界條件的處理方法與應(yīng)用。理論推導(dǎo)出了共形變換下阻抗邊界條件在變換前后應(yīng)遵循的變換形式,并通過仿真進(jìn)行了驗(yàn)證。2.以天線應(yīng)用為背景,提出了逆變換光學(xué)的設(shè)計(jì)思路,實(shí)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(shè)計(jì)。針對(duì)傳播波到表面波轉(zhuǎn)化表面的設(shè)計(jì)進(jìn)行了深入和細(xì)致的研究,分析了坐標(biāo)變換方式以及厚度的不同對(duì)其輻射特性的影響。3.基于逆變換光學(xué)理論,設(shè)計(jì)出了一種新型的多波束雙極化轉(zhuǎn)換表面,并對(duì)結(jié)構(gòu)參數(shù)進(jìn)行了合理的近似和有效的簡(jiǎn)化,最終通過緊湊的多層人工電磁表面結(jié)構(gòu)予以實(shí)現(xiàn)。本文研究表明,以變換光學(xué)為理論指導(dǎo),以人工電磁材料為物質(zhì)基礎(chǔ)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(xué)科研究領(lǐng)域蘊(yùn)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(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN820

【參考文獻(xiàn)】

相關(guān)博士學(xué)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(xué);2008年

，

本文編號(hào)：1676128