發(fā)布時間：2018-05-05 08:20

  本文選題：太赫茲 + 微帶天線　； 參考：《中北大學(xué)》2015年碩士論文

【摘要】：本論文主要是在光子晶體的理論基礎(chǔ)上，利用MATLAB仿真軟件對異質(zhì)鏡像對稱結(jié)構(gòu)的一維光子晶體在THz波段中的帶隙結(jié)構(gòu)和光學(xué)傳輸特性進行仿真和分析。同時利用光子晶體的光子帶隙特性以及光子晶體的缺陷模型，設(shè)計了一款將一維光子晶體缺陷模型應(yīng)用在微帶天線上的天線，并且所設(shè)計的微帶天線的中心工作頻率是0.2THz，，利用三維電磁仿真軟件HFSS仿真設(shè)計和分析光子晶體微帶天線，也利用軟件Origin分析光子晶體微帶天線的仿真結(jié)果，在理論上對設(shè)計的天線進行了仿真分析。論文的主要內(nèi)容具體如下： (1)分別詳細(xì)地介紹了光子晶體和微帶天線的理論基礎(chǔ)，包括光子晶體概念、光子晶體的結(jié)構(gòu)、光子晶體的計算方法以及光子晶體的應(yīng)用；還包括微帶天線的定義、微帶天線的輻射機理、天線的性能參數(shù)和幾種典型的微波光子晶體天線。 (2)基于一維介質(zhì)中的傳輸矩陣法研究了一維光子晶體(ABBA)N在0.1THz~0.9THz頻段處的光子帶隙的變化。在不考慮材料的色散和偏振的前提下，在0.1THz~0.9THz范圍內(nèi)，分析了光子晶體的周期數(shù)、薄層厚度以及入射角對該光子晶體結(jié)構(gòu)透射譜的影響。結(jié)果表明：在太赫茲頻段處周期數(shù)對光子帶隙幾乎沒有影響，薄層的總厚度隨著縮放比例的增加光子帶隙的數(shù)目在不斷地增加，并且發(fā)現(xiàn)光子帶隙的寬度在不斷變寬，而隨著入射角的增大THz波段的光子帶隙向著高頻方向移動。這為THz器件的研究起到一定的作用。 (3)將光子晶體應(yīng)用到微帶天線上，利用光子晶體的光子帶隙特性，提高微帶天線的性能。通過HFSS軟件設(shè)計了一款中心頻率在0.2THz的一維光子晶體微帶天線，并且對比了光子晶體微帶天線與普通微帶天線的增益的變化，以及光子晶體的周期層數(shù)對設(shè)計的天線的影響，同時也分析了光子晶體與微帶天線的距離對天線的S11的影響。這款設(shè)計的光子晶體微帶天線工作的頻帶在THz頻段，為THz頻段應(yīng)用在通信中提供一定的參考意義。
[Abstract]:Based on the theory of photonic crystals, the band gap structure and optical transmission characteristics of one-dimensional photonic crystals with heterogeneous mirror symmetry structure in THz band are simulated and analyzed by MATLAB simulation software. Based on the photonic band gap characteristics of photonic crystal and the defect model of photonic crystal, a one-dimensional photonic crystal defect model is designed for microstrip antenna. The center working frequency of the designed microstrip antenna is 0.2THz. the photonic crystal microstrip antenna is simulated and analyzed by using three-dimensional electromagnetic simulation software HFSS, and the simulation results of the photonic crystal microstrip antenna are also analyzed by the software Origin. The antenna is simulated and analyzed theoretically. The main contents of the thesis are as follows: The theoretical basis of photonic crystal and microstrip antenna are introduced in detail, including the concept of photonic crystal, the structure of photonic crystal, the calculation method of photonic crystal and the application of photonic crystal, and the definition of microstrip antenna. Radiation mechanism of microstrip antenna, antenna performance parameters and several typical microwave photonic crystal antennas. (2) based on the transfer matrix method in one-dimensional medium, the change of photonic band gap in 0.1THz~0.9THz band of one-dimensional photonic crystal (ABBAN) is studied. Without considering the dispersion and polarization of the material, the effects of the number of photonic crystal periods, the thickness of thin layer and the incident angle on the transmission spectrum of the photonic crystal structure are analyzed in the 0.1THz~0.9THz range. The results show that the number of periods at terahertz band has little effect on the photonic band gap, and the total thickness of the thin layer increases with the increase of the scaling ratio, and the width of the photonic band gap becomes wider and wider. The photonic band gap in THz band moves towards high frequency with the increase of incidence angle. This plays an important role in the research of THz devices. The photonic crystal is applied to the microstrip antenna and the photonic band gap property of the photonic crystal is used to improve the performance of the microstrip antenna. A one-dimensional photonic crystal microstrip antenna with center frequency in 0.2THz is designed by HFSS software. The gain of photonic crystal microstrip antenna is compared with that of ordinary microstrip antenna, and the effect of the number of periodic layers of photonic crystal on the designed antenna is compared. The influence of the distance between photonic crystal and microstrip antenna on S _ 11 is also analyzed. The designed photonic crystal microstrip antenna operates in the THz band, which provides a reference for the application of the THz band in communication.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN822

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本文編號：1846942