本文選題：人工周期結(jié)構(gòu)　切入點：電磁帶隙　出處：《南京理工大學(xué)》2015年博士論文

【摘要】：針對現(xiàn)代電子信息系統(tǒng)工作時所面臨的內(nèi)部噪聲(導(dǎo)行波)和外部空間波的抑制問題,本論文深入研究了包含電磁帶隙(Electromagnetic Bandgap,EBG)和頻率選擇表面(Frequency Selective Surface,FSS)在內(nèi)的兩類人工周期結(jié)構(gòu)的電磁特性,以期實現(xiàn)它們在上述問題中的應(yīng)用。按照EBG和FSS的分類,本論文依次提出了C-EBG、耦合C型槽線EBG、SC-EBG、三維打印十字架型EBG、基于2.5維閉合環(huán)的FSS以及三維打印方形同軸線型FSS,具體內(nèi)容包括:(1)提出C-EBG結(jié)構(gòu),將其應(yīng)用于電源地平面,能夠有效抑制更低頻率的電源地噪聲,通過等效電路模型和色散圖模式分析對其阻帶機理進行了物理解釋,研究了旋轉(zhuǎn)不對稱性對其噪聲抑制性能的影響,給出了其頻域和時域噪聲抑制性能。(2)提出耦合C型槽線EBG結(jié)構(gòu),將其應(yīng)用于差分傳輸線的參考地平面,能夠抑制寬頻帶的共模噪聲,對其進行了奇偶模等效電路分析,通過偶模等效電路模型研究了不同耦合方式對其共模噪聲抑制阻帶的影響。(3)在C-EBG基礎(chǔ)上提出了 SC-EBG結(jié)構(gòu),通過加載金屬柱有效增大了原始C-EBG周期單元的等效電容,縮小了周期單元的電尺寸,且由于金屬柱的引入,構(gòu)造了更為復(fù)雜緊湊的高階模式諧振腔,從而在降低噪聲抑制阻帶下截止頻率的同時,也提高了阻帶上截止頻率,進一步展寬了阻帶帶寬。(4)將三維打印技術(shù)引入到EBG封裝屏蔽盒的設(shè)計中,提出十字架型3-D EBG以抑制封裝內(nèi)的平行平板噪聲,該十字架型3-D EBG能夠同時增大周期單元的等效電容和等效電感,展寬阻帶帶寬和縮小周期單元電尺寸。(5)提出基于2.5維閉合環(huán)的帶阻型FSS,在其周期單元內(nèi)通過4個金屬化過孔將位于襯底上下層正交放置的兩對開口方向相對的C型環(huán)首尾相連,構(gòu)成2.5維閉合環(huán)結(jié)構(gòu),有限周期單元尺寸內(nèi)增加的閉合環(huán)周長顯著減小了 FSS周期單元的電尺寸,通過等效電路建模對其小型化的機理進行了物理解釋。(6)進一步,基于三維打印技術(shù),提出方形同軸線型3-D FSS,該3-D FSS給入射電磁波提供了兩條傳播路徑,利用其多傳輸零極點的特性提高了方形同軸線型FSS通帶邊緣的陡峭性,增強了高頻帶外抑制性能。
[Abstract]:Aiming at the problem of internal noise (guided traveling wave) and external space wave suppression in modern electronic information system,In this paper, the electromagnetic characteristics of two kinds of artificial periodic structures, including electromagnetic band gap (EBG) and frequency-selective surface frequency Selective surface (FSS), are studied in order to realize their application in the above problems.According to the classification of EBG and FSS, this paper puts forward C-EBG, coupled C-slot EBG-SC-EBG, 3D printed cross EBG, FSS based on 2.5-dimensional closed loop and three-dimension printing square coaxial line, including the structure of C-EBG.Applying it to the ground plane of the power supply can effectively suppress the noise of the lower frequency power source. The stopband mechanism is explained by the equivalent circuit model and the dispersion pattern analysis.In this paper, the effect of rotational asymmetry on noise suppression performance is studied. The noise suppression performance in frequency domain and time domain is given. The coupled C-slot EBG structure is proposed and applied to the reference ground plane of differential transmission line.The common-mode noise can be suppressed in a wide band, and the odd-even mode equivalent circuit is analyzed. The influence of different coupling modes on the suppression stopband of the common-mode noise is studied by using the even-mode equivalent circuit model. The SC-EBG structure is proposed on the basis of C-EBG.By loading the metal column, the equivalent capacitance of the original C-EBG periodic element is increased effectively, and the electric size of the periodic element is reduced. Because of the introduction of the metal column, a more complex and compact high-order mode resonator is constructed.Thus, while reducing the noise suppression stopband cutoff frequency, it also improves the stopband cut-off frequency, and further broadens the stopband bandwidth. (4) Three-dimensional printing technology is introduced into the design of EBG packaging shielding box.The cross 3-D EBG is proposed to suppress the parallel plate noise in the package. The cross 3-D EBG can increase the equivalent capacitance and inductance of the periodic unit at the same time.Broadening the stopband bandwidth and reducing the electrical size of the periodic unit. (5) A band-stop FSS based on a 2.5 dimensional closed ring is proposed, in which two pairs of C-shaped rings with opposite opening directions located at the top and bottom layers of the substrate are connected through four metallized holes in the periodic unit.A 2.5-dimensional closed ring structure is constructed. The increase in the circumference of the closed ring within the size of the finite periodic element significantly reduces the electrical size of the FSS periodic unit. The mechanism of miniaturization is explained by the equivalent circuit modeling.Based on 3D printing technology, a square coaxial 3-D FSS is proposed. The 3-D FSS provides two propagation paths for incident electromagnetic waves, and the steepness of the edge of square coaxial FSS passband is improved by using its multi-transmission zero-pole characteristic.The performance of high frequency out-band suppression is enhanced.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2015
【分類號】：TN03

【相似文獻】

相關(guān)會議論文 前3條

1 張勤;崔曉萍;;中藥人工周期療法在婦科疾病中的應(yīng)用[A];第九次全國中醫(yī)婦科學(xué)術(shù)大會論文集[C];2009年

2 劉瑞芬;張登山;;運用補、調(diào)、溫、通四法辨治排卵障礙性不孕癥[A];第十次全國中醫(yī)婦科學(xué)術(shù)大會論文集[C];2010年

3 周叔平;周然宓;林華;;針灸結(jié)合中藥人工周期療法治療月經(jīng)不調(diào)75例療效觀察[A];全國中醫(yī)婦科第七次學(xué)術(shù)研討會論文匯編[C];2007年

相關(guān)重要報紙文章 前1條

1 東南大學(xué)附屬中大醫(yī)院婦產(chǎn)科 主任醫(yī)師 鄭惠方;人工周期療法是怎么回事[N];家庭醫(yī)生報;2003年

相關(guān)博士學(xué)位論文 前1條

1 施永榮;新型人工周期結(jié)構(gòu)的特性研究及應(yīng)用[D];南京理工大學(xué);2015年

相關(guān)碩士學(xué)位論文 前3條

1 汪華鑫;人工周期梁結(jié)構(gòu)缺陷模式的動態(tài)特性及應(yīng)用[D];浙江大學(xué);2016年

2 蔡蘅;李麗蕓教授中藥人工周期療法治療排卵障礙性不孕的研究[D];廣州中醫(yī)藥大學(xué);2013年

3 錢艷平;中西藥人工周期療法治療卵巢儲備功能下降的臨床觀察[D];云南中醫(yī)學(xué)院;2015年

，

本文編號：1713400