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研究生:詹漢琳
研究生(外文):Han-Lin,Jhan
論文名稱:可實現於小型化有限面積環境中之提升雙頻天線隔離度研究
論文名稱(外文):The study of improving isolation between antennas for PCB size limited scenario application
指導教授:陳一鋒彭嘉美
指導教授(外文):I-Fong, ChenChia-Mei, Peng
學位類別:碩士
校院名稱:景文科技大學
系所名稱:電腦與通訊系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:106
語文別:中文
論文頁數:76
中文關鍵詞:天線隔離度有限面積環境平面倒F天線
外文關鍵詞:isolationPCB size limited scenarioPIFA
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  本論文主要探討天線在小型化有限面積環境中的隔離度。近年來無線通訊產品發展蓬勃,市面上各種產品皆在追尋「輕、薄、短、小」等的特點,又因為現今產品多數已發展至MIMO或是MU-MIMO,因此這些無線通訊產品的天線之隔離度將會受到嚴峻的挑戰。在大多數的文獻當中,雙頻天線隔離度的改善都是利用兩種架構來改善隔離度,然而本篇提出在小型化2.4GHz與5GHz雙頻天線模組,以不改變天線型式的情況下增加雙頻去耦合元件,雙頻去耦合元件是從接地面延伸出一條地線,並在末端做成螺旋狀,使此元件可以提高2.4GHz與5GHz的隔離度、提升輻射效率,並且透過耦合的效應縮小天線的尺寸。
In this thesis, we will discuss improving isolation between antennas for PCB size limited scenario application, in recent years the rapid development of wireless communications products, it is well known that wireless communications products must have light, thin, short and small features. Most of today's products have been developed to MIMO or MU-MIMO, so the isolation of these wireless communications antenna will be severely challenged. In this paper, we do not change the antenna type, increase the decoupling element. The decoupling element protrudes from ground plane and spirals at the end which can improve the antenna isolation, radiation efficiency, andreduces the size of the antenna by the coupling effect.
第一章 緒論 1
1.1 研究動機與目地 1
1.2 無線通訊系統發展 3
1.3 內容摘要 4
第二章 天線相關理論 5
2.1 簡介 5
2.2偶極天線 5
2.4天線隔離度 Isolation 11
2.5 Envelope Correlation Coefficient (ECC) 12
第三章 優化天線隔離度方法之相關探討 14
3.1 簡介 14
3.2 分集技術之探討 14
3.3 天線隔離度與非理想接地面之探討 23
第四章 改善隔離度方法之實際應用 39
4.1簡介 39
4.2.1雙頻天線設計模擬 41
4.2.2雙頻天線頻寬設計 43
4.2.3雙頻MIMO天線設計 45
4.2.4雙頻去耦合元件MIMO天線設計 47
4.3雙頻去耦合元件參數分析 50
4.4雙頻去耦合元件MIMO天線電流分佈分析與增益比較 55
4.5去耦合元件寬細變化之探討 62
4.6實作驗證 66
第五章 結論 73
參考文獻 75
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[2] JingYa Deng; JinYong Li; Luyu Zhao; LiXin Guo,” A Dual-Band Inverted-F MIMO Antenna With Enhanced Isolation for WLAN Applications”, IEEE Antennas and Wireless Propagation Letters. vol.16, pp. 2270-2273, 2017
[3] Wikipedia, https://en.wikipedia.org/wiki/IEEE_802.11
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McGraw-Hill, 2003.
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[6] Antenna-Theory, http://www.antenna-theory.com/
[7] Wikipedia, https://en.wikipedia.org/wiki/MIMO
[8] J. N. Hwang, and S. J. Chung, “Isolation Enhancement Between Two Packed Antennas With Coupling Element,” IEEE Antennas Wireless Propag. Lett, vol. 10, pp. 1263–1266, 2011
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[10] Yuandan Dong, Senior Member, IEEE, Jun Choi, Member, IEEE, and Tatsuo [ Itoh, Life Fellow, IEEE” Folded Strip/Slot Antenna with Extended Bandwidth [ for WLAN Application” IEEE Antennas and Wireless Propagation Letters. Vol. [ 16, Page(s): 673 – 676, 2016.

[11] Chao-Ming Luo, Jing-Song Hong, Member, IEEE, and Lin-Lin Zhong” Isolation Enhancement of a Very Compact UWB-MIMO Slot Antenna With Two Defected Ground Structures”. IEEE Antennas and Wireless Propagation Letters. Vol. 14, Page(s): 1766 – 1769, 2015.
[12] Marina Mavridou, Alexandros P. Feresidis, Senior Member, IEEE, and Peter Gardner, Senior Member, IEEE” Tunable Double-Layer EBG Structures and Application to Antenna Isolation”. IEEE Antennas and Wireless Propagation Letters. Vol. 64, Page(s): 70 – 79, 2016.
[13] Ding-Bing Lin, Chih-YuWu, Cheng-Hsien Sung and Pei Wei Lin Department of Electronic Engineering National Taipei University of Technology Taipei, Taiwan” Miniaturized Dual-Layers LTE MIMO Printed Antenna with Hybrid Decoupling Elements to Improve Isolation” IEEE Conferences, Pages: 1-4, 2015.
[14] Xing Zhao , Swee Ping Yeo, and Ling Chuen Ong” Planar UWB MIMO Antenna With Pattern Diversity and Isolation Improvement for Mobile Platform Based on the Theory of Characteristic Modes”. IEEE Transactions on Antennas and Propagation, Volume: 66, Jan. 2018.
[15] X. Zhou, X. Quan, and R. Li, “A Dual-Broadband MIMO Antenna System for GSM/UMTS/LTE and WLAN Handsets,” IEEE Antennas Wireless Propag. Letter, vol. 11, pp. 551–554, 2012.
[16] Z. Liu, P. Hall, and D.Wake,“Dual-frequency planar inverted-F antenna", IEEE transaction on Antennas & Propagation, Vol. 45,pp. 1451-1458, October 1997.


[17] L. Y. Zhao and K. L. Wu, "A Dual-Band Coupled Resonator Decoupling Network for Two Coupled Antennas," IEEE Transactions on Antennas and Propagation, vol. 63, no. 7, pp. 2843-2850, July 2015. 1766 – 1769, 2015.
[18] L. Minz and R. Garg, "Reduction of mutual coupling between closely spaced PIFAs," Electronics Letters, vol. 46, no. 6, pp. 392-394, March 18 2010.
[19] Surentiran Padmanathan, Azremi Abdullah Al-Hadi, Ping Jack Soh, “A compact two-port tunable dual-band spiral antenna for MIMO terminals” IEEE Conferences, 21 December 2017.
[20] Ria Maria George; Suresh Nair; Ahamed P. Ameen; Dinesh Kumar,” Integrated spiral-shaped monopole antenna for 2.4/5.2 GHz dual-band operation” IEEE Conferences, 08 August 2013.
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