臺灣博碩士論文加值系統

　　如何避免相互耦合是設計多輸入多輸出天線系統的重要問題，因為它會產生破壞性干涉，影響到天線的效率，在本論文中，提出利用在天線之間加入具有帶拒濾波器特性的開口諧振環，改變接地面結構，並探討對隔離度的影響。研究結果發現開口諧振環的尺寸控制抑制頻段的中心頻率，不同開口方向和位置對天線系統的隔離度也有不同的影響，量測結果證明開口諧振環可以減少相互耦合量，並提高天線系統的隔離度，同時也能有效提升天線的增益與輻射效率。

　　Mutual coupling has been a critical issue on designing MIMO antenna systems. Mutual coupling produces destructive interference and which reduces the efficiency of the antenna. In this study, split-ring resonator having a band-stop filter characteristics, is placed to between the antenna and the effect of isolation is investigated. The size of the split-ring resonator controls the center frequency of suppression, opening directions and position have effects on the isolation of the antenna system. The measured results show that split-ring resonator not only reduces the mutual coupling of the antenna system, but also enhance gain and radiation efficiency of the antenna.

摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 xi
第一章 序論 1
1-1 研究動機與目的 1
1-2 論文章節概要 2
第二章 基礎理論與文獻探討 3
2-1　單極天線理論 3
2-1-1　鏡像原理 3
2-1-2　單極天線 5
2-2　50Ω傳輸線線寬計算 7
2-3　多輸入多輸出天線系統 9
2-4　相關文獻 11
2-4-1　去耦合元件 11
2-4-2　集總元件 14
2-4-3　寄生元件 17
2-4-4　中性線 19
2-4-5　T型槽孔與電容元件 21
第三章 開口諧振環與天線單頻隔離度探討 23
3-1　概述 23
3-2　開口諧振環 24
3-2-1　前言 24
3-2-2 架構與設計 26
3-2-3 尺寸參數分析 30
3-3　單頻多輸入多輸出天線之設計 33
3-3-1 天線架構設計 33
3-3-2 模擬與量測結果 34
3-4　開口諧振環應用於天線單頻隔離度之探討 38
3-4-1　單環之架構設計 38
3-4-2　單環之模擬與量測結果 39
3-4-3　單環之開口方向與距離參數分析 43
3-4-4　雙環之架構設計與不同參數分析 52
3-4-5　雙環之模擬與量測結果 56
3-5　結果與討論 61
第四章　多輸入多輸出天線之雙頻隔離度探討 66
4-1　概述 66
4-2　雙頻多輸入多輸出天線之設計 67
4-2-1　天線架構設計 67
4-2-2　模擬與量測結果 68
4-3　開口諧振環應用於天線雙頻隔離度之探討 72
4-3-1　單頻雙環之架構設計 72
4-3-2　單頻雙環之模擬與量測結果 73
4-3-3　雙頻雙環之架構設計 78
4-3-4　雙頻雙環之模擬與量測結果 79
4-4　結果與討論 84
第五章　結論 87
參考文獻 88

http://goo.gl/FjM1Yf，TRI 拓墣產業研究所
https://goo.gl/Oo3m0G，MIMO – 維基百科
Jon W. Wallace and Michael A. Jensen, “Mutual Coupling in MIMO Wireless Systems: A Rigorous Network Theory Analysis”, IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 4, JULY 2004 pp.1317-1325.
Angus C.K. Mak, Corbett R. Rowell, and Ross D. Murch , “Isolation Enhancement Between Two Closely Packed Antennas”, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 56, NO. 11, NOVEMBER 2008 pp.3411-3419.
Shin-Chang Chen, Yu-Shin Wang, and Shyh-Jong Chung, “A Decoupling Technique for Increasing the Port Isolation Between Two Strongly Coupled Antennas”, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 56, NO. 12, DECEMBER 2008 pp.3650-3658.
Zhengyi Li, Zhengwei Du, Masaharu Takahashi, Kazuyuki Saito and Koichi Ito, Fellow, “Reducing Mutual Coupling of MIMO Antennas With Parasitic Elements for Mobile Terminals”, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 60, NO. 2, FEBRUARY 2012 pp.473-481.
Saou-Wen Su, Cheng-Tse Lee and Fa-Shian Chang, “Printed MIMO-Antenna System Using Neutralization-Line Technique for Wireless USB-Dongle Applications”, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 60, NO. 2, FEBRUARY 2012 pp.456-463.
Jungsik Park, Junho Choi, Ji-Yong Park, and Young-Sik Kim, “Study of a T-Shaped Slot With a Capacitor for High Isolation Between MIMO Antennas”, IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 11, 2012 pp.1541-1544.
林國聖，“應用於無線網路單極天線之研究”，義守大學碩士論文，2012
顏春賢，“適用於無線區域網路平面雙頻S 形單極天線之設計及應用”，國立成功大學電機工程研究所，2007
Samuel Silver, “Microwave Antenna Theory and Design”, McGraw-Hill Book Company, 1949.
陳俊甫，“應用於LTE之小型化平面天線的研究”，義守大學碩士論文，2014
宋哲輝，“多輸入多輸出天線系統隔離度之研究”，義守大學碩士論文，2015
Najam A.I., Duroc Y., Tedjini, S. “A novel collocated antennas system for UWB-MIMO applications. Proceedings of IEEE Radio and Wireless Systems.”, Jan. 2009 pp.368-371.
http://goo.gl/92TZ8f，短距離無線傳輸技術分析
https://goo.gl/F1iMeD，WLAN信道列表 - 維基百科
Joan García-García, Ferran Martín, Francisco Falcone, Jordi Bonache, I. Gil, Txema Lopetegi, Miguel A. G. Laso, Mario Sorolla and Ricardo Marqués, “Spurious Passband Suppression in Microstrip Coupled Line Band Pass Filters by Means of Split Ring Resonators”, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 9, SEPTEMBER 2004 pp.416-418.
O. Sydoruk, E. Tatartschuk, E. Shamonina, and L. Solymar, “Analytical formulation for the resonant frequency of split rings”, J. Appl. Phys. 105, 014903 (2009) pp. 014903-1~4.
George V. Eleftheriades, Omar Siddiqui, and Ashwin K. Iyer, “Transmission Line Models for Negative Refractive Index Media and Associated Implementations Without Excess Resonators”, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 13, NO. 2, FEBRUARY 2003 pp.51-53.
Xian Qi Lin and Tie Jun Cui, “Controlling the Bandwidth of Split Ring Resonators”, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 18, NO. 4, APRIL 2008 pp.245-247.
Francisco Falcone, Txema Lopetegi, Juan D. Baena, Ricardo Marqués, Ferran Martín, and Mario Sorolla, “Effective Negative-ε Stopband Microstrip Lines Based on Complementary Split Ring Resonators”, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, VOL. 14, NO. 6, JUNE 2004 pp.280-282.
Nemai Chandra Karmakar, Sushim Mukul Roy, and Isaac Balbin, “Quasi-Static Modeling of Defected Ground Structure”, IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 54, NO. 5, MAY 2006 pp.2160-2168.
https://goo.gl/h9oE9g，IEEE 802.11 - 維基百科
C.Y. Pan, C.H. Huang, and T.S. Homg” A Novel Printed G-Shaped Monopole Antenna for Dual-Band WLAN Applications” Antennas and Propagation Society International Symposium, 2004. IEEE Vol.3 2004 pp.3099-3102.