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博碩士論文 etd-0604101-174251 詳細資訊
Title page for etd-0604101-174251
論文名稱
Title
以空氣為介質層之寬頻平板天線研究
STUDIES OF BROADBAND PATCH ANTENNAS WITH AN AIR SUBSTRATE
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
134
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2001-05-28
繳交日期
Date of Submission
2001-06-04
關鍵字
Keywords
寬頻帶操作、雙頻帶操作、降低交叉極化天線設計、微帶天線、縮小化微帶天線設計
BROADBAND OPERATION, COMPACT MICROSTRIP ANTENNAS, REDUCE CROSS-POLARIZATION, MICROSTRIP ANTENNAS, DUAL-FREQUENCY OPERATION
統計
Statistics
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中文摘要
本論文的內容是針對以空氣為介質層之寬頻平板天線設計做研究、分析與探討。文中內容包含一些以空氣為介質層之寬頻天線設計。首先,具V形槽孔之雙頻帶操作平板天線設計,針對在三角形平板天線表面蝕刻一具V形槽孔可以造成雙頻的操作。接著研究是關於平板天線的寬頻帶設計,所提出的是使用蝕刻U形槽孔及兩寬直槽孔於平板天線的各項新型設計,這些設計其操作頻寬可以達到25%以上。此外,在降低交叉極化方面,針對以空氣為介質層之結構,提出已具180度相位差之雙饋入寬頻平板天線及具U形接地面之寬頻平板天線設計,來有效降低在H平面上交叉極化輻射,效果可達10至15dB,最後,使用H形槽孔饋入外加以接短路片的形式,可得到約26.2%的操作頻寬,且將天線輻射面積降為原本的40至50%。
Abstract
Novel broadband designs of patch antennas with an air substrate have been proposed in this dissertation. In the dual-frequency design, the study of single-fed dual-frequency microstrip antenna with a V-shaped slot has been first presented. As for the broadband patch antenna design, antennas with a U-shaped slot or a pair of wide slits can have an operating bandwidth more than 2.0 times that of a conventional one at a given operating frequency. The antenna bandwidth of then can be enhanced about 25%. In the designs of reducing cross-polarization, by using dual capacitive feeds with equal input powers, but with a 180°-phase shift, The cross-polarization radiation can be reduce about 10 to 15dB in the H-plane. Finally, A broadband shorted patch antenna fed by an aperture-coupled feed with an H-shaped coupling slot is proposed. By using an air substrate of thickness about 0.07 free-space wavelength of the center operating frequency, the proposed antenna can have an impedance bandwidth of about 26.2%. And the antenna design reduced the antenna size to be 40%~50%of the simple case.
目次 Table of Contents
文 字 目 錄

文字目錄 -------------------------------------------------------------i
圖形目錄 -----------------------------------------------------------iii
表格目錄 ----------------------------------------------------------xiii

第一章 序論 (Introduction) ------------------------------------------------1
1.1 概述 -----------------------------------------------------1
1.2 文獻導覽 ---------------------------------------------------1
1.3 內容提要 ---------------------------------------------------2

第二章 具V形槽孔的雙頻平板天線設計
(Design of Dual-frequency Patch Antennas with a V-shaped Slot) -------5
2.1 概述 -------------------------------------------------------5
2.1.1 薄介質層雙頻平板天線的設計----------------------------5
2.2 設計概念 ---------------------------------------------------8
2.3 實驗結果與分析---------------------------------------------14
2.4 綜合討論 --------------------------------------------------20

第三章 具有U形槽孔之寬頻平板天線設計
(Design of Broadband Patch Antennas with a U-shaped Slot)------------21
3.1 概述--------------------------------------------------------21
3.2 設計概念 ---------------------------------------------------30
3.3 具U形槽孔之三角形平板天線設計-------------------------------31
3.3.1 天線結構----------------------------------------------31
3.3.2 實驗結果與討論----------------------------------------31
3.4 具U形槽孔之矩形平板天線設計---------------------------------39
3.4.1 天線結構----------------------------------------------39
3.4.2 實驗結果與討論----------------------------------------39

第四章 具兩寬直槽縫之寬頻平板天線設計
(Design of Broadband Patch Antennas with a Pair of Slits) -----------49
4.1 概述--------------------------------------------------------49
4.2 具一對寬直槽縫之矩形(E形金屬片)平板天線設計-----------------55
4.2.1 天線結構----------------------------------------------55
4.2.2 實驗結果與討論----------------------------------------55
4.3 具一對寬直槽縫之圓形平板天線設計----------------------------63
4.3.1 天線結構----------------------------------------------63
4.3.2 實驗結果與討論----------------------------------------63
4.4 電容耦合饋入之具一對寬直槽縫之圓形平板天線設計--------------70
4.4.1 天線結構----------------------------------------------70
4.4.2 結果與實驗討論----------------------------------------72

第五章 有效降低寬頻平板天線交叉極化之設計
(Cross-Polarization Reduction for Broadband Patch Antennas )---------79
5.1 概述--------------------------------------------------------79
5.2 設計概念 ---------------------------------------------------79
5.3 具有180°相差及單一輻射元件之雙饋入平板天線設計-------------80
5.3.1 天線結構----------------------------------------------80
5.3.2 實驗結果與討論----------------------------------------80
5.4 具有180°相差之1 ×2陣列平板天線設計------------------------88
5.4.1 天線結構----------------------------------------------88
5.4.2 實驗結果與討論----------------------------------------88
5.5 具有U形接地面之寬頻平板天線設計-----------------------------96
5.5.1 天線結構----------------------------------------------96
5.5.2 實驗結果與討論----------------------------------------97
5.6 具有倒p形接地面之寬頻平板天線設計--------------------------107
5.6.1 天線結構---------------------------------------------107
5.6.2 實驗結果與討論---------------------------------------107

第六章 寬頻槽孔耦合短路平板天線設計
(Broadband Aperture-Coupled Shorted Patch Antenna Design)-----------114
6.1 概述-------------------------------------------------------114
6.2 設計概念---------------------------------------------------114
6.3 天線結構---------------------------------------------------116
6.3 實驗結果與討論---------------------------------------------116

第七章 結論 (Conclusions)--------------------------------------------------123

參考文獻 (References)--------------------------------------------------------125


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