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研究生:黃德倫
研究生(外文):Der-Lun Huang
論文名稱:平面印刷式數位電視天線之設計
論文名稱(外文):Designs of Planar printed DTV Antennas
指導教授:劉文忠劉文忠引用關係
學位類別:碩士
校院名稱:國立虎尾科技大學
系所名稱:光電與材料科技研究所
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:2009
畢業學年度:97
語文別:中文
論文頁數:75
中文關鍵詞:數位電視天線平面印刷天線微帶線單極天線
外文關鍵詞:DTV AntennaPlanar-printed DTV AntennaMicrostrip lineMonopole antenna
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近年來,無線通訊產業快速的發展,因此天線在傳輸上扮演重要之腳色。目前台灣的數位電視因台數的問題尚未實際普及化,而目前市售較為廣泛的數位電視天線皆以線圈製作方式為主,所以在製作上會較困難。因此本論文以平面印刷方式設計硬式數位電視天線及使用軟式介質設計數位電視天線,而使其製作方式可以較為容易。
無線數位電視發展至今,為了方便使用於建築物及行動裝置中等不同地方,其天線所要求會有所不同。本論文所提出之天線是以家用型及行動裝置(車用型)為主,因為目前台灣家用型數位電視天線大多以外接式為主,所以在此論文當中所設計之天線是可直接與數位電視作結合。而在第五章所提出之天線,除了可為家用型也可容易與車子作結合。本論文主要研究是以應用於數位電視之平面印刷天線,為使數位電視天線為全向性,而在第三章中使用的設計之方式以微帶線饋入方式設計及在結構上則使用簡單之方式設計,主要目的是為了方便製造及容易與數位電視直接結合。而在第四章節使用同軸探針饋入式方式設計,利用可延長接地金屬層電流路徑之設計方式,主要目的為解決第三章天線面積偏大的問題。第五章則使用可彎曲的介質材料來設計,為了使用在不同空間中,使天線在運用上可以多樣化。所提出之天線設計的電腦模擬分析、實物製作及實驗量測結果包含阻抗匹配頻寬、輻射場型、天線增益、及實際使用數位電視棒(盒)和數位電視上測試等,都將在本論文中做詳細的陳述與討論。
In the past years, the industry of wirelesscommunication expanded a lot so the antenna plays an important role. Presently, the digital television (DTV) in Taiwan is not very popular because the number of channels is still not that plenty enough. Besides, the DTV antennas are made up coils, which is very difficult to fabricate. Therefore, the design method of fabricating antennas is the way of planar-printed instead of using the traditional hard DTV antennas because it is easier to fabricate. Also, another method in the thesis is to use supple medium. It is easier to fabricate as well.
Wireless DTV being developed so far, the antenna that we want is different and convenient to use different buildings and mobile apparatus, The proposed antennas in the thesis are indoor and mobile apparatus (using in car) mainly. The indoor DTV antennas almost use coaxial cable to connect the DTV in Taiwan presently, so the antennas integrate with DTV directly in this thesis. The proposed antenna in chapter 5 can use indoor and integrate with car. The main research being used in chapter 3 is the method of microstrip-line-fed in planar-printed antenna for DTV application and the fabrication of the omnidirectional patterns of DTV antenna. We use the easy structures to design the antennas for being convenient to fabricate and integrate with DTV mainly. The way of Coaxial Probe-fed is designed in chapter 4, using the devise-method of extendable the electric current at the metal layer of the ground, solving the problem of the bigger square measure in the chapter 3, and curved medium is implemented in chapter 5 for using different space and being variety. The simulated analysis of antenna, made-up articles of antenna, and measured results of antenna including the impedance bandwidth, radiation patterns, antenna gain, using DTV for testing and so on, are all detailedly described and discussed in the thesis.
中文摘要 .................................................i
英文摘要 ................................................ii
誌謝 ...............................................iii
目錄 ................................................iv
圖目錄 ................................................vi
第一章 序論.............................................1
1.1 研究背景與動機...................................1
1.2 文獻導覽.........................................2
1.3 論文架構.........................................3
第二章 無線數位電視及數位電視天線之介紹.................4
2.1 何謂無線數位電視.................................4
2.2 數位電視的天線需求及系統規格.....................5
第三章 應用於數位電視單極天線設計......................10
3.1 前言............................................10
3.2 微帶線饋入之單極天線............................10
3.2.1 天線設計........................................10
3.2.2 模擬與實驗結果..................................11
3.2.3 研究探討與心得..................................11
3.3 微帶線饋入之階梯型單極天線......................22
3.3.1 天線設計........................................22
3.3.2模擬與量測結果..................................22
3.3.3 研究探討與心得..................................23
第四章 同軸探針饋入式之非對稱天線......................37
4.1 前言............................................37
4.2 天線設計........................................37
4.3 模擬與量測結果..................................38
4.4 研究探討與心得..................................38
第五章 貼片式L型天線...................................52
5.1 前言............................................52
5.2 天線設計........................................52
5.3 模擬與量測結果..................................52
5.4 研究探討與心得..................................53
第六章 結論............................................67
參考文獻 ................................................68
英文大綱 ................................................73
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