本文選題：太赫茲 + 濾波器��； 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：太赫茲波(Terahertz,THz)是一種波長在0.03mm-3mm、頻率在0.1-10THz之間的電磁波,頻率范圍介于微波和紅外光波之間。隨著THz波源技術(shù)與探測技術(shù)的快速發(fā)展,THz通信技術(shù)也得到了極大的發(fā)展,THz功能器件的性能也必須相匹配。本文設(shè)計了三種THz功能器件并測試其性能。本文主要研究內(nèi)容如下:1、提出了一種聚酰亞胺(PI)柔性材料作為襯底的超材料濾波器,使用CST MWS軟件進(jìn)行仿真,在0~1.5THz頻段共有兩個通帶,中心頻率分別為0.53THz和1.23THz,透射率分別為0.88和0.97,帶寬分別為30%,50%,與硅襯底相比,帶寬與透射率都大大增加,但是頻點會相應(yīng)的右移,并且隨著PI襯底厚度的增加,三個中心頻率向左移動。本文詳細(xì)的探索了器件的制備工藝,最終采用光刻工藝制備了尺寸誤差均在合理范圍內(nèi)的器件,采用THz-TDS系統(tǒng)對結(jié)構(gòu)進(jìn)行透射測試,測得硅襯底濾波器經(jīng)具有2個通帶,中心頻率分別為320GHz和1150GHz,透射率分別為0.5和0.6,帶寬分別為30%和50%;PI襯底濾波器具有兩個通帶,中心頻率分別為450GHz和1175GHz,透射率分別為0.4和0.95,與硅襯底結(jié)構(gòu)相比,頻率分別右移了130GHz和20GHz,并且透射率有明顯的改善,與仿真結(jié)果基本相符。2、提出一種基于開口諧振環(huán)結(jié)構(gòu)(SRR)的雙開口諧振單元組成的濾波器,使用CST MWS軟件進(jìn)行仿真,設(shè)計了濾波器的結(jié)構(gòu)。加工的成品經(jīng)測試,在0.33 THz出現(xiàn)一個高通諧振峰,透過率達(dá)到0.9,3 dB帶寬為72%;另一個高通諧振峰在1.12 THz,透過率達(dá)到0.86,3 dB帶寬為48%。3、鍶鐵氧體極化偏轉(zhuǎn)性質(zhì)的探索:以五種不同的燒結(jié)溫度制備了鍶鐵氧體,采用THz-TDS測試系統(tǒng)對樣品進(jìn)行THz波透射測試,表明THz波透射率會隨著燒結(jié)溫度的增加而降低。另外,本文搭建了THz無線收發(fā)系統(tǒng),并測試了樣品在該系統(tǒng)下的透射率及極化偏轉(zhuǎn)角,材料的極化偏轉(zhuǎn)角隨燒結(jié)溫度的增加有緩慢增加的趨勢。
[Abstract]:Terahertz (THz) is a kind of electromagnetic wave with a wavelength of 0.03mm-3mm and a frequency between 0.1-10THz and the frequency range between microwave and infrared light.With the rapid development of THz wave source technology and detection technology, THz communication technology has been greatly developed and the performance of THz functional devices must be matched.In this paper, three kinds of THz functional devices are designed and tested.The main contents of this paper are as follows: 1. A kind of supermaterial filter with polyimide (Pi) flexible material as substrate is proposed, which is simulated by CST MWS software. There are two passbands in the 0~1.5THz band.The center frequencies are 0.53THz and 1.23 THZ, the transmittance is 0.88 and 0.97, and the bandwidth is 30 and 50, respectively. Compared with silicon substrate, the bandwidth and transmittance increase greatly, but the frequency points shift to the right, and the thickness of Pi substrate increases.Three center frequencies move to the left.In this paper, the fabrication process of the device is explored in detail. Finally, the device with reasonable size error is fabricated by photolithography. The transmission test of the structure is carried out by using THz-TDS system, and the silicon substrate filter has two pass bands.The center frequency is 320GHz and 1150 GHz, the transmittance is 0.5 and 0.6, the bandwidth is 30% and 50% respectively, the center frequency is 450GHz and 1175 GHz, and the transmittance is 0.4 and 0.95 respectively.The frequencies are shifted to the right of 130GHz and 20GHz, respectively, and the transmissivity is obviously improved, which is basically in accordance with the simulation results. A filter composed of double open resonant units based on the open resonant ring structure is proposed and simulated by CST MWS software.The structure of filter is designed.The finished product was tested and a high pass resonance peak appeared at 0. 33 THz.Another high pass resonance peak is 1.12 THZ, and the transmittance of 0.86 ~ 3 dB bandwidth is 48.3. the polarization deflection property of strontium ferrite is investigated. Strontium ferrite was prepared at five different sintering temperatures.The THz wave transmittance of the samples was measured by THz-TDS system. The results show that the transmittance of THz wave decreases with the increase of sintering temperature.In addition, the THz wireless transceiver system is built, and the transmittance and polarization deflection angle of the sample under the system are tested. The polarization deflection angle of the material increases slowly with the increase of sintering temperature.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN713

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