應用於室內之台灣頻帶數位電視寬頻天線設計與研究

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研究生：	鄭渝勳 Yu-Hsun Cheng
論文名稱：	應用於室內之台灣頻帶數位電視寬頻天線設計與研究 Design and Research of Broadband Monopole indoor Antennas for Taiwan DVB-T
指導教授：	陳永芳 Yung-Fang Chen
口試委員:
學位類別：	碩士 Master
系所名稱：	資訊電機學院 - 通訊工程學系在職專班 Executive Master of Communication Engineering
論文出版年：	2013
畢業學年度：	101
語文別：	中文
論文頁數：	87
中文關鍵詞：	數位電視、天線、對稱單極天線、非對稱單極天線、微帶線、多頻帶
外文關鍵詞：	asymmetric and symmetry monopole antenna, Micro-strip line
相關次數：	點閱：15 下載：0
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隨著時代進步，近年來電視(TV)產品蓬勃發展。電視已從傳統的類比電視訊號轉換成數位電視(Digital Video Broadcasting – Terrestrial)訊號，近年來更發展出所謂的連網電視(Smart TV)，進而使電視能夠整合家用寬頻網路的應用。相信在未來，電視將隨著科技發展而整合更多的功能。

本論文所提出的兩款天線(Antenna)主要是應用於室內並符合台灣頻帶的數位電視接收天線(DVB-T, 530MHz ~ 596MHz)，其包含規劃中的DVB-T2(602MHz ~ 626MHz)頻段。而因應未來電視發展趨勢，便將此兩款天線設計成寬頻天線，使其頻帶包含台灣目前使用通訊系統之頻帶；包含全球衛星定位系統(GPS, 1575.42MHz)、DCS1800(1710MHz ~ 1880MHz)、WCDMA Band1(1920 ~ 2170MHz)及無線網路(WLAN, 2400MHz ~ 2485MHz, 5150MHz ~ 5825MHz)。

此兩款天線是以單極天線(monopole)型態做設計，使用對稱及非對稱結構，並以微帶線結構(Micro-strip line)做為能量饋入的方式。一開始使用天線基本理論計算出天線所需尺寸，接著並透過電磁模擬軟體HFSS進行模擬與分析，爾後並使用FR4板進行實作，且使用電波無反射暗室(Chamber)做效率量測，進而製作出符合台灣使用之通訊系統多頻帶的天線。

Due to the progress of technology and science in these years, the TV products are developed flourishingly. Obviously, the TV products have been transformed from transmission based on analog signals to Digital Video Broadcasting – Terrestrial signals. Recently, there is so-called Smart TV, which could be incorporated with the functions and the use of Broadband Networks. Hopefully, the functions of TV products will be improved with the science and technology development.

This thesis will focus on two kinds of antennas, which can be applied for the indoor and being conformed with the digital TV reception antenna of band of Taiwan, which includes the planning DVB-T2. For coping with the tendency of TV product development, these two antennas are designed for broadband，and the bands of communication systems in Taiwan, such as GPS、DCS1800、WCDMA Band1, and WLAN are included.

These two antennas are designed based on the asymmetric and symmetry monopole antenna types, and they use the Micro-strip line structure for the way of feeding the energy. After using the basic theory of antenna design to calculate the required size of antenna initially, then we perform the simulation and the analysis by Ansoft HFSS and make the physical model with FR4 board. At last, we passed the efficiency and gain volume test of Chamber to produce the physical antenna which may be adopted as the practical use for the multi-band communication systems in Taiwan.

摘要......................................................i
ABSTRACT.................................................ii
誌謝.....................................................iii
圖目錄....................................................vi
表目錄.....................................................x
第一章、緒論.................................... ............1
1-1 研究動機................................................1
1-2 文獻探討................................................3
1-3 論文架構................................................3
第二章、天線原理及參數介紹.....................................4
2-1 天線基本原理.............................................4
2-2 鏡像原理................................................6
2-3 單極天線................................................8
2-4 微帶線..................................................9
2-5 阻抗匹配...............................................15
2-6 反射損失...............................................19
2-7 史密斯圖...............................................21
第三章、天線設計與模擬........................ ...............23
3-1 非對稱階梯形單極天線--應用於台灣系統多頻帶...................23
3-2 非對稱階梯形單極天線結構變化參數分析........................27
3-3 對稱長方形單極天線--應用於台灣數位電視接收天線................34
3-4 對稱長方形單極天線結構變化參數分析..........................38
第四章、天線實作量測與分析....................................51
4-1 天線模擬與實作量測分析...................................51
4-2 市售天線量測分析........................................61
4-3 天線接收實測比較........................................69
第五章、結論................................................70
參考文獻.................................................. 71
                                

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