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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 吳宗霖(Tzong-Lin Wu) | |
| dc.contributor.author | Chien-Hua Hung | en |
| dc.contributor.author | 洪健華 | zh_TW |
| dc.date.accessioned | 2021-06-16T05:27:15Z | - |
| dc.date.available | 2019-09-04 | |
| dc.date.copyright | 2014-09-04 | |
| dc.date.issued | 2014 | |
| dc.date.submitted | 2014-08-14 | |
| dc.identifier.citation | [1] J. D. Gavenda, “Measured effectiveness of a toroid choke in reducing common-mode current,” in Proc. IEEE Int. Symp. Electromagn. Compat., pp. 208–210, Denvor, CO, May 1989.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/56409 | - |
| dc.description.abstract | 利用訊號干擾的技術，本文提出一種新穎的共模濾波器。此濾波器是由一組差模訊號線和指環狀槽孔接地結構所構成，而其等效電路能夠有效地解釋如何創造出傳輸零點。此結構是在綠能材料下實現，其大小約為 ，而對應到的物理尺寸為 。此濾波器可以對3.85秭赫茲到7.4秭赫茲的共模雜訊產生超過10 dB的抑制頻帶，並且達到63 %的比例頻寬。同時幾乎不會對差模訊號產生影響，這也意味著保持十分高品質的訊號完整度。此外，在結合上述結構下，本文提出模擬連接式電纜輻射的評估版，並且在抑制頻帶內達到壓抑電磁干擾的輻射。
其次，本文亦提出吸收式共模濾波器，在接地面上放置電阻的方式來改善輻射，其等效電路可以有效的解釋如何在單一頻率點達到最大的吸收效果。此結構實現於綠能材料下，而其大小約為0.65 0.47 ，並且對應到的物理尺寸為14 mm 10 mm。此濾波器能夠對3秭赫茲到10秭赫茲的共模雜訊產生超過10 dB的抑制，並且在3.5秭赫茲產生超過90 %的吸收功率。同樣地，保持高品質的差模訊號完整度。此外，本文也提出結合上述結構的連接式電纜輻射評估版，並在其吸收頻帶與抑制頻帶觀察到電磁干擾的輻射被壓抑。 | zh_TW |
| dc.description.abstract | A novel common-mode filter is proposed based on signal interference technique. It is composed of differential signal lines and the ring slot on the ground plane. Its equivalent circuit model is developed to explain how to create transmission zeroes. The proposed structure is realized on PCB substrate, and its electrical size is about corresponding to a real size of .The filter constructs the 10 dB common- mode stopband from 3.85 GHz to 7.4 GHz with a 63 % fractional bandwidth. In the meantime, very little influence is seen for differential signal, which means the high-quality signal integrity is maintained. Moreover, the cable-attached evaluation board with the proposed structure is demonstrated, and the suppression of electromagnetic interference (EMI) emission is achieved in the stopband.
Next, the absorptive common-mode filter is presented with resistors on the ground plane to improve the radiation. Its equivalent circuit model is established to explain how to reach a maximum absorption at a frequency. The proposed structure is also realized on PCB substrate, and its electrical size is about 0.65 0.47 corresponding to a real size of 14 mm 10 mm. The filter shows over 10 dB reduction from 3 GHz to 10 GHz in common mode with a 108 % fractional bandwidth, and over 90 % absorption power at 3.5 GHz. Also, the high-quality differential signal integrity is kept. In addition, the cable-attached evaluation board with the proposed structure is represented. It is observed that the EMI emission is suppressed in the stopband and absorption band. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T05:27:15Z (GMT). No. of bitstreams: 1 ntu-103-R01942026-1.pdf: 8070203 bytes, checksum: 21e3cef4a0f5c1b942cfbe052caf977c (MD5) Previous issue date: 2014 | en |
| dc.description.tableofcontents | 口試委員會審定書 #
誌謝 i 中文摘要 ii ABSTRACT iii CONTENTS iv LIST OF FIGURES vii LIST OF TABLES xii Chapter 1 Introduction 1 1.1 Motivation 1 1.2 Literature Survey 2 1.3 Contribution 4 1.4 Thesis Outline 4 Chapter 2 Basic Concept and Theory of Common- Mode Filter 6 2.1 Mixed-mode S-parameters 6 2.2 Analysis of Symmetrical and Reciprocal 4-port Network 9 2.2.1 Odd Mode (Differential Mode) 11 2.2.2 Even Mode (Common Mode) 13 2.2.3 Cross Mode (Mode Conversion) 14 2.3 Slotline and Microstrip-to-Slotline Transition 16 2.3.1 The Characteristics of a Slotline 16 2.3.2 Microstrip-to-slotline Transition 20 Chapter 3 Novel Low-Cost Common-mode Filter Design by Signal Interference Technique 27 3.1 Concept of Signal Interference 27 3.2 Analytical Model and Its Solution 29 3.2.1 35 3.2.2 35 3.2.3 37 3.2.4 38 3.2.5 The Design Procedure for Three Transmission Zeroes 40 3.3 Proposed Common-mode Filter Structure and Experimental Results 41 3.3.1 Proposed Structure 41 3.3.2 Equivalent Circuit Model 42 3.3.3 Simulation and Experimental Results in Frequency Domain 44 3.3.4 Eye Diagram Results in Time-Domain 52 3.4 Radiation Problem of Patterned Ground Structure (PGS) 56 Chapter 4 Absorptive Common-Mode Filter Design with Resistors 64 4.1 Design Concept of Absorptive Common-mode Filter 64 4.1.1 Radiation Improvement by Resistors 64 4.1.2 Equivalent Circuit Model Analysis 67 4.2 Proposed Absorptive Common-mode Filter Structure and Experimental Results 77 4.2.1 Proposed Structure 77 4.2.2 Equivalent Circuit Model 78 4.2.3 Simulations and Experimental Results in Frequency Domain 80 4.2.4 Eye Diagram Results in Time Domain 89 4.3 Discussion and Comparison 92 Chapter 5 Application – EMI Suppression Caused by Attached Cable 95 5.1 Evaluation Board Design 95 5.2 Simulation and Experimental Results 97 Chapter 6 Conclusion 105 REFERENCE 107 | |
| dc.language.iso | zh-TW | |
| dc.subject | 訊號完整度 | zh_TW |
| dc.subject | 電磁干擾 | zh_TW |
| dc.subject | 共模濾波器 | zh_TW |
| dc.subject | 共模輻射 | zh_TW |
| dc.subject | common-mode radiation | en |
| dc.subject | Common-mode filter | en |
| dc.subject | electromagnetic interference | en |
| dc.subject | signal integrity | en |
| dc.title | C型槽線結構之共模濾波器設計 | zh_TW |
| dc.title | Absorptive Common-mode Filter Design with C-shaped Slotline Structure | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 102-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 林丁丙(Ding-Bing Lin),邱奕鵬(Yih-Peng Chiou),盧信嘉(Hsin-Chia Lu) | |
| dc.subject.keyword | 共模濾波器,共模輻射,電磁干擾,訊號完整度, | zh_TW |
| dc.subject.keyword | Common-mode filter,common-mode radiation,electromagnetic interference,signal integrity, | en |
| dc.relation.page | 108 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2014-08-14 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
| 顯示於系所單位： | 電信工程學研究所 | |
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| ntu-103-1.pdf 未授權公開取用 | 7.88 MB | Adobe PDF |
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