臺灣博碩士論文加值系統

本論文提出二款由軟板製作之內嵌式數位電視天線，第一款天線為台灣數位電視內嵌式，此天線是採用迴�策﹞挼u結構，並安裝於通用串列傳輸器之側面，其面積僅為5X131mm2。為增加天線之有效電流路徑，本設計採用極細且多�絳々圻惕樲飭u及次迴�絨]計，以滿足UHF頻帶之天線接收需求。第二款天線為全頻帶數位電視內嵌式天線，該天線是採用單極天線結構，並安置於通用串列傳輸器三面內牆，該天線符合全球數位電視頻帶，即470~860MHz，本論文利用返回損失、穿透損失、輻射場型及數位電視實際訊號分別評估上述兩款天線之特性，並獲得相當良好之結論。

This thesis develops two embedded antennas for digital TV applications. The antennas are fabricated by flexible printed circuit boards. The first antenna, which is designed for Taiwan DTV band (533MHz~593MHz), is based on loop structure. By utilizing multiple meandered lines with sub-loops, the antenna can effectively increase its electric length and may be embedded into a USB dongle. The design merely occupies a small area of 5*131mm2. The second antenna is designed for the whole DTV band worldwide. The antenna is based on monopole structure and composed of multiple resonant meandered monopoles. By using the three sidewalls of a USB dongle, the antenna demonstrates an impedance bandwidth with return loss better than 5dB from 470 to 870MHz. In this thesis, the antenna designs are evaluated in terms of the return losses, transmission losses, radiation patterns as well as an actual receiving capability test with a DTV signal generator. The experimental results sustain the superior performance of the proposed antennas.

目錄
摘要
Abstract
誌謝
目錄
圖目錄
表目錄
第一章 緒論
1.1 研究背景
1.2 研究目的
1.3 論文架構
第二章 基礎天線理論
2.1 前言
2.2 微型化天線(Electric Small Antennas )其及頻寬限制
2.3 偶極天線
2.4 單極天線
2.5 鏡像原理(Image Theory)
2.6 結語
第三章 台灣數位電視頻帶之內嵌式天線設計
3.1 前言
3.2 天線設計環境
3.2.1 天線環境與尺寸設定
3.2.2 天線架構
3.3 天線幾何結構的參數變化探討與分析
3.4 天線之量測與討論
3.4.1 天線返回損失(Return Loss)量測
3.4.2 天線的S21參數量測
3.4.3 天線的輻射場型與增益量測
3.4.4 數位電視訊號接收實測
3.5 結語
第四章 全頻帶數位電視之內嵌式天線設計
4.1 概述
4.2 天線設計環境
4.2.1 天線環境與尺寸設定
4.2.2 天線架構
4.3 天線幾何結構的參數變化探討與分析
4.3.1 天線結構分析與參數探討
4.3.2 電腦接地面之影響
4.4 天線輻射特性之量測與討論
4.4.1 天線的S21參數之量測
4.4.2 天線輻射場型之量測
4.5 結語
第五章 結論
參考文獻

[1] http://zh.wikipedia.org/
[2] http://info.gio.gov.tw/
[3] http://www.dtvc.org.tw/2-1.htm
[4] http://www.ttv.com.tw/Serviceweb/2004Hdtv/index-1-about.html
[5]Gary Breed,” Basic Principles Electrically Small Antennas” From February 2007 High Frequency Electronics Summit Technical Media, LLC,2007
[6]A. T. Gary, L. D. Phil, and P. P. Robert,” On The Lower Bound of the Radiation Q for Electrically Small Antennas” IEEE Trans. Antennas Propagation, VOL. 51,pp. 6, JUNE 2003
[7]Slyusar V. I.,”60 years of Electrically Small Antennas Theory” International Conference on Antenna Theory and Techniques, 17-21 September, 2007, Sevastopol, Ukraine pp. 116-118.
[8]J. D. Kraus, R. J. Marhefka,” Antennas For All Applications, “3rd Ed, New York: McGraw-Hill, Inc., 2002
[9]C. A. Balanis, Antenna Theory: Analysis and Design, 2nd Ed., New York: John　Wiley & Sons, Inc., 1997.
[10]Warren L. Stutzman, Gray A. Thiele, Antenna Theory and Design, John Wiley & Sons, Inc., 2nd Edition, 1997.