本文選題：超材料吸波體　切入點(diǎn)：太赫茲　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：超材料是一種人為構(gòu)造的新型結(jié)構(gòu)材料,具有天然材料所不具備的超常電磁特性,為操控電磁波提供了一種新的途徑。太赫茲技術(shù)由于其獨(dú)有的特性及潛在的應(yīng)用價(jià)值,使太赫茲頻段的調(diào)控器件成為研究熱點(diǎn)之一。但自然界的大多數(shù)材料在太赫茲頻段的電磁響應(yīng)均較弱,而超材料的出現(xiàn)為太赫茲技術(shù)的發(fā)展和應(yīng)用提供了新的機(jī)遇。本文主要開(kāi)展了微波及太赫茲雙頻超材料吸波體研究,并對(duì)太赫茲頻段的超材料吸波體進(jìn)行了設(shè)計(jì)、制作與測(cè)試。論文所做的主要工作及成果如下:(1)開(kāi)展了X波段雙頻超材料吸波體的設(shè)計(jì)及仿真研究,通過(guò)表面電流及數(shù)值仿真分析得到,其在8.84GHz處吸收率達(dá)到98.86%,基板的厚度為其工作波長(zhǎng)的1/70;在11.86GHz處吸收率為94.09%,基板的厚度為其工作波長(zhǎng)的1/50。(2)開(kāi)展了基于超材料的太赫茲超薄吸波體的研究工作,分析了入射角、電磁損耗、結(jié)構(gòu)參數(shù)對(duì)超材料吸波體諧振頻率和吸收率的影響。采用聚酰亞胺薄膜作為柔性基底,設(shè)計(jì)了雙頻柔性超材料吸波體,通過(guò)對(duì)其仿真分析得到,在100.65GHz處達(dá)到98.76%的吸收,在131.05GHz處達(dá)到94.64%的吸收,吸波體的厚度在兩個(gè)諧振頻點(diǎn)處分別為工作波長(zhǎng)的1/58和1/44。(3)開(kāi)展了THz超薄吸波體加工工藝的研究,采用MEMS光刻技術(shù)對(duì)超材料吸波體進(jìn)行制備,得到了陣列為30×30為的超材料吸波體樣品。對(duì)其吸收特性測(cè)試得到,和仿真結(jié)果相比,低頻諧振頻率紅移了1.05GHz,高頻諧振頻率藍(lán)移了1.45GHz。
[Abstract]:Metamaterials are a new type of artificial structural materials, which have the supernormal electromagnetic properties which are not possessed by natural materials, which provide a new way to manipulate electromagnetic waves. Terahertz technology has its unique characteristics and potential application value. It makes the control devices of terahertz band one of the research hotspots, but the electromagnetic response of most materials in nature is weak in the terahertz band. The appearance of metamaterials provides a new opportunity for the development and application of terahertz technology. In this paper, microwave and terahertz dual-frequency supermaterial absorbers are studied, and the supermaterial absorbers in terahertz band are designed. The main work and results of this paper are as follows: (1) the design and simulation of X-band dual-frequency supermaterial absorber are carried out, and the results are obtained by surface current and numerical simulation analysis. The absorptivity is 98.86 at 8.84 GHz, and the thickness of the substrate is 1 / 70 of its working wavelength; at 11.86 GHz, the absorptivity is 94.09, and the thickness of the substrate is 1 / 50. 2 of its working wavelength.) the ultra-thin terahertz absorber based on supermaterial is studied and the incident angle is analyzed. The effects of electromagnetic loss and structure parameters on the resonance frequency and absorptivity of the supermaterial were studied. Using polyimide film as the flexible substrate, the dual frequency flexible supermaterial absorber was designed. At 100.65 GHz and 94.64% GHz, the thickness of the absorber is 1/58 and 1 / 44.3of the working wavelength at the two resonant frequency points, respectively. The processing technology of the THz ultra-thin absorber is studied. MEMS photolithography was used to prepare the supermaterial absorber, and the supermaterial absorber sample with the array of 30 脳 30 was obtained. Compared with the simulation results, the low-frequency resonant frequency shifted 1.05 GHz red and the high-frequency resonant frequency blue-shifted 1.45 GHz.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TB34

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本文編號(hào)：1588013