本文選題：超材料　切入點(diǎn)：微帶傳感器　出處：《太原理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：超材料是一種亞波長(zhǎng)結(jié)構(gòu)單元組成的周期性人工電磁材料,其在特定的頻段內(nèi)表現(xiàn)為負(fù)的介電常數(shù)和磁導(dǎo)率,并且具有某些奇異的電磁特性,如慢波特性、負(fù)多普勒效應(yīng)等�；诔牧系膫鞲衅髡l(fā)越來越多的關(guān)注,這類傳感器不存在分離元件,具有小型化、高靈敏度的特點(diǎn),可以很方便地與其他微波器件進(jìn)行集成。首先本文對(duì)國內(nèi)外的超材料傳感器進(jìn)行了總結(jié)分析,并且在此基礎(chǔ)上,對(duì)傳感器的工作原理和分析方法進(jìn)行了闡述及總結(jié)。本文的主要內(nèi)容如下:(1)概括性地介紹了傳輸線理論、開口諧振SRR(Split Ring Resonator)和開口互補(bǔ)諧振環(huán)CSRR(Complementary Split Ring Resonator)的相關(guān)工作機(jī)理。同時(shí),著重研究了從S參數(shù)中提取媒質(zhì)等效的電磁參數(shù)的方法,并且對(duì)其進(jìn)行了詳細(xì)驗(yàn)證。另外,重點(diǎn)介紹了超材料傳感器等效電路模型,這將有助對(duì)超材料傳感器進(jìn)行分析及進(jìn)一步的改進(jìn)。(2)設(shè)計(jì)了兩種不同的諧振環(huán):齒輪型CSRR和雙互補(bǔ)螺旋DCSR(Double Complementary Split Resonator),并將兩種尺寸相同的諧振環(huán)分別加載改進(jìn)后的微帶線進(jìn)行了仿真模擬,對(duì)影響傳感器的性能的相關(guān)主要參數(shù)進(jìn)行了分析討論;另外對(duì)兩種諧振環(huán)進(jìn)行了比較分析。(3)最后,設(shè)計(jì)了一種差分型超材料傳感器。首先介紹了分頻器的原理,然后在分頻器的基礎(chǔ)上加載一對(duì)齒輪型CSRR作為差分型折射率傳感器。通過優(yōu)化參數(shù)使得傳感器一個(gè)諧振頻率固定,通過兩諧振頻率的差值來消除外界因素的干擾得出更加精確的待測(cè)物體的折射率。通過仿真實(shí)驗(yàn)證明該傳感器具有更高的靈敏度,誤差也處于可控范圍之內(nèi)。
[Abstract]:Metamaterials are periodic artificial electromagnetic materials composed of subwavelength structure units, which exhibit negative permittivity and permeability in specific frequency bands, and have some strange electromagnetic properties, such as slow wave properties. Negative Doppler effect and so on. The sensor based on supermaterial is attracting more and more attention. This kind of sensor has the characteristics of miniaturization and high sensitivity. It can be easily integrated with other microwave devices. Firstly, this paper summarizes and analyzes the supermaterial sensors at home and abroad, and on this basis, The working principle and analytical method of the sensor are described and summarized. The main contents of this paper are as follows: 1) the transmission line theory, the open resonance SRR(Split Ring Resonator and the open complementary resonant ring CSRR(Complementary Split Ring Resonator) are introduced. The method of extracting the equivalent electromagnetic parameters from the S parameters is studied and verified in detail. In addition, the equivalent circuit model of the supermaterial sensor is introduced emphatically. This will help to analyze and further improve the metamaterial sensors. We have designed two different resonant rings: the gear CSRR and the double complementary helical DCSR(Double Complementary Split Resonator. The strip line is simulated by simulation. The main parameters affecting the performance of the sensor are analyzed and discussed. In addition, two resonant rings are compared and analyzed. Finally, a differential hypermaterial sensor is designed. Firstly, the principle of the frequency divider is introduced. Then a pair of gear type CSRR is loaded on the basis of the frequency divider as the differential refractive index sensor, and the resonant frequency of the sensor is fixed by optimizing the parameters. The refractive index of the object to be measured is obtained by eliminating the interference of external factors by the difference of the two resonant frequencies. The simulation results show that the sensor has higher sensitivity and the error is within the controllable range.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP212;TB34

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