【摘要】：電磁異向介質(zhì)已經(jīng)成為當(dāng)前電磁工程的研究熱點(diǎn)之一,憑借其獨(dú)特的“負(fù)折射特性”、“后向波特性”等性質(zhì)在固體物理學(xué)、材料科學(xué)、光學(xué)、應(yīng)用電磁學(xué)、生物醫(yī)學(xué)工程等領(lǐng)域受到廣泛青睞。目前電磁異向介質(zhì)方面的研究主要集中于異向特性研究,介質(zhì)單元結(jié)構(gòu)設(shè)計(jì),雙負(fù)特性驗(yàn)證以及異向介質(zhì)應(yīng)用等幾個(gè)方面。本文在前人經(jīng)驗(yàn)基礎(chǔ)上進(jìn)一步研究,設(shè)計(jì)出兩種性能優(yōu)良的電磁異向介質(zhì)并將之應(yīng)用于生物醫(yī)學(xué)工程領(lǐng)域。 本文主要工作有： 1)詳細(xì)闡述了經(jīng)典電磁異向介質(zhì)的構(gòu)造原理,介紹了Rod陣列負(fù)介電常數(shù)成因和SRR結(jié)構(gòu)、對(duì)口環(huán)諧振器負(fù)磁導(dǎo)率的成因。 2)提出了一種工作于S頻段的電磁異向介質(zhì)結(jié)構(gòu)單元。該結(jié)構(gòu)由對(duì)稱兩組鏡框型金屬結(jié)構(gòu)組成,可同時(shí)獲得負(fù)介電常數(shù)和負(fù)磁導(dǎo)率的雙負(fù)特性。研究中對(duì)負(fù)磁導(dǎo)率進(jìn)行了定性理論分析,并根據(jù)后向波理論,設(shè)計(jì)了通過場(chǎng)空間相位對(duì)后向波特性進(jìn)行仿真驗(yàn)證的方法。 3)設(shè)計(jì)出一種單面蝕刻的二維各向同性電磁異向介質(zhì)單元。首次提出場(chǎng)-路結(jié)合的等效源分析法以計(jì)算異向介質(zhì)等效介電常數(shù)、磁導(dǎo)率,并據(jù)此對(duì)該結(jié)構(gòu)單元的左手特性激發(fā)機(jī)理進(jìn)行了論證。 4)將電磁異向介質(zhì)應(yīng)用于生物醫(yī)學(xué)工程領(lǐng)域,利用電磁異向介質(zhì)單負(fù)頻段的阻帶效應(yīng),設(shè)計(jì)并驗(yàn)證了一種降低人體對(duì)手機(jī)輻射吸收率的方案。
[Abstract]:Electromagnetic anisotropic medium has become one of the current research hotspots in electromagnetic engineering. By virtue of its unique "negative refraction characteristics", "backward wave characteristics" and other properties in solid state physics, material science, optics, applied electromagnetism, Biomedical engineering and other fields are widely favored. At present, the research on the electromagnetic anisotropic medium is mainly focused on the research of the anisotropic characteristics, the structure design of the dielectric element, the verification of the double negative characteristics and the application of the different medium. In this paper, based on the previous experience, two kinds of electromagnetic anisotropic media with excellent performance are designed and applied to biomedical engineering. The main work of this paper is as follows: 1) the construction principle of classical electromagnetic anisotropic medium is described in detail, and the cause of formation of negative dielectric constant and SRR structure of Rod array and negative permeability of counter ring resonator are introduced in detail. 2) an electromagnetic anisotropic dielectric element working in S band is proposed. The structure is composed of symmetrical two groups of mirror frame metal structures, and the negative permittivity and negative permeability can be obtained at the same time. In the research, the negative permeability is analyzed qualitatively, and according to the backward wave theory, a simulation method is designed to verify the characteristics of the backward wave through the phase of the field space. 3) A two dimensional isotropic electromagnetic anisotropic dielectric element with one side etching is designed. An effective source analysis method combining field and circuit is proposed for the first time in order to calculate the equivalent permittivity and permeability of the dissimilar medium, and the excitation mechanism of the left-handed characteristic of the structure element is demonstrated. 4) the electromagnetic anisotropic medium is applied to biomedical engineering field. A scheme to reduce the radiation absorption of mobile phone is designed and verified by using the band blocking effect of electromagnetic anisotropic medium in single negative frequency band.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：R318.0

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