超寬頻微帶天線之設計與研究｜國立臺灣科技大學博碩士論文系統

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研究生：	張雲鑑 YUN-JIAN CHANG
論文名稱：	超寬頻微帶天線之設計與研究 Design and Research of Ultra Wide Band Patch Antenna
指導教授：	王秀仁 Show-Ran Wang
口試委員:	徐敬文 Ching-Wen Hsue 邱炳樟 none
學位類別：	碩士 Master
系所名稱：	電資學院 - 電子工程系 Department of Electronic and Computer Engineering
論文出版年：	2008
畢業學年度：	96
語文別：	中文
論文頁數：	158
中文關鍵詞：	超寬頻、微帶天線、共面波導
外文關鍵詞：	UWB, Patch Antenna, CPW
相關次數：	點閱：291 下載：1
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上一筆

本論文旨在設計與研究超寬頻技術之微帶天線。本設計之天線選擇以共面波導結構當作能量饋入方式，而天線型態主要包含平面單極型天線、共平面電容性耦合型天線、以及共平面電感性耦合型天線等三大類，並以全向性、擁有超寬頻帶及小型化為目標，由感光玻璃纖維基板進行實現與量測。
在平面單極天線方面，本研究更改基本圓盤型態及共面波導接地面之單極超寬頻天線：先探討共面波導各參數特性後，再於負載及接地面兩方面做應對於縮小化後之改良設計。第二類則為環形單極天線，其中又分為太極型態超寬頻天線以及利用多重圓環帶拒型超寬頻天線：先藉由環狀結構抓取第一共振點，最後再利用環內負載的設計以擴展頻寬或是利用多重圓環達到具帶拒功能之設計。第三種則為具碎狀結構之圓盤單極超寬頻天線；此天線則嘗試利用碎狀結構的多模共振特性來達到超寬頻之頻寬。
而在共平面電容性耦合型天線部分，本研究以寬槽孔型為主，利用環槽加入、增加內槽比例、以及縮小化應用等三方向來達到優化效果，並於本論文收錄各別實做與量測分析。
至於共平面電感性耦合型天線，以結領式槽孔型為主，利用饋入線兩旁做步階挖槽設計以擴展頻寬外，再利用增加兩旁接地面之高度以優化反射損耗，此兩類之實做與量測結果亦於論文中呈現。

This thesis is focused on developing ultra-wideband (3.1 GHz ~ 10.6GHz) planar antennas with coplanar waveguide as feeding mode. The goal is to design an applicable and minimized antenna with ultra-wideband function. The configuration of these antennas can be classified into three main groups, monopole-dipole model, coplanar waveguide capacitive coupling model, and coplanar waveguide inductance coupling model, which return loss in these models was measured using network analyzer.
For monopole dipole model, three designs of ultra-wideband antennas were conducted as follows: monopole antenna, ring antenna and circular fractal antenna. In monopole antenna, the size of antenna was reduced by changing basic circular monopole patch and its ground. In ring antenna, increased band width is achieved by changing load in the inner circle and notched function/band rejection function is derived from multiple rings addition. The third kind is circular fractal antenna application. We try to use its multi-resonance characteristic to reach standard band width in ultra-wideband system.
With the coupling by CPW-fed capacitive mode, wide slot antennas were used and optimized by adding ring slot in load center or increasing the ratio of inner slot diameter to reach ultra-wideband frequency.
For CPW-fed inductance coupling model, bow-tie slot antennas were used and return loss was significantly reduced by slotting ladder-shaped structure next to the feeding line and lifting up side ground to 2.8mm higher. After measuring by network analyzer, 3.1GHz∼10GHz ultra-wideband was achieved.

To sum up, there are 9 kinds of omni-directional antennas accomplished on FR4 board which operates at the frequency range of the UWB systems.

摘要	Ⅰ
ABSTRACT	Ⅱ
致謝	Ⅲ
目錄	Ⅳ
圖目錄	ⅤⅡ
表目錄   ⅩⅣ

第一章	緒論...................................................1
1 研究動機....................................................1
2 超寬頻系統簡介及應用現況....................................1
2.1 UWB簡介...................................................1
2.2 UWB發展歷程...............................................2
2.3兩大陣營對於超寬頻系統略敘.................................4
2.4超寬頻系統特色整理與未來展望...............................5
3 論文架構....................................................7
第二章  微帶天線理論及相關文獻應用..............................9
1 微帶天線及饋入架構..........................................9
1.1微帶天線幾何結構...........................................9
1.2微帶天線特性..............................................10
1.3微帶天線饋入結構概敘......................................10
2 相關文獻回顧...............................................13
3 天線設計流程...............................................15
4 共面波導基礎理論與應用.....................................17
4.1共面波導概論..............................................17
4.2圓柱單極天線近似法........................................19
第三章  改良式圓盤超寬頻天線...................................22
1 前言.......................................................22
2 共平面波導饋入圓盤天線之探討...............................22
3 共平面波導饋入圓盤天線之縮小優化設計.......................28
2.1饋入線設計................................................29
2.2天線負載端之挖槽與挖槽中再加負載..........................31
2.3饋入端接地面之設計........................................32
4 縮小共面波導饋入結構之圓盤天線實做與量測...................33
第四章  環形結構之超寬頻天線...................................40
1 前言.......................................................40
2 環狀結構之天線探討與設計...................................40
2.1圓環形天線模擬探討........................................40
2.2太極型態超寬頻天線........................................42
2.3多重圓環帶拒型超寬頻天線..................................45
3 環形天線之實作與量測探討...................................47
3.1太極型態超寬頻天線實做與量測..............................47
3.2多重圓環帶拒型超寬頻天線實做與量測........................53
第五章  具碎型特徵之超寬頻天線.................................60
1 前言.......................................................60
2 具碎狀結構之天線設計探討...................................60
2.1簡單碎狀結構之超寬頻天線實做..............................60
2.2碎型結構天線細部模擬探討..................................65
2.3結合兩種基本碎型天線之探討................................67
2.4碎型天線再轉置之討論......................................68
3 具碎狀結構之超寬頻天線實做與量測...........................71
第六章  寬槽孔型超寬頻天線.....................................78
1 前言.......................................................78
2 寬槽孔天線之基本架構探討...................................78
2.1寬槽孔天線之內槽大小與形狀探討............................78
2.2寬槽孔天線之內槽中負載大小與形狀探討......................82
3 寬槽孔型超寬頻天線之優化...................................86
3.1利用增加圓環槽的優化討論..................................86
3.2利用增加內槽比例來在擴展頻寬..............................89
3.3縮小化之設計..............................................91
4 寬槽孔型超寬頻天線之實做與量測.............................93
4.1增加圓環槽之寬槽孔超寬頻天線量測..........................93
4.2增加內槽比例之寬槽孔天線量測..............................99
4.3再縮小化設計之寬槽孔天線量測.............................105
第七章  結領式槽孔型超寬頻天線................................112
1 前言......................................................112
2 結領式槽孔天線概敘探討....................................112
2.1基本型態結領天線探討及展頻應用...........................112
2.2優化改良結領式槽孔天線設計...............................117
3結領式槽孔天線實做與量測...................................120
3.1雙圓環槽之結領式槽孔天線實做與量測.......................120
3.2增加下槽孔接地面高度之結領式槽孔天線實做與量測...........127
第八章  結論..................................................133
附錄  天線量測設備及場型量測環境..............................136
參考文獻......................................................140

                                

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