剖風儀之關鍵零組件-相移器之研製

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姓名

羅文信(Wu- Shin LO) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

剖風儀之關鍵零組件-相移器之研製
(Key component of wind profiler-the develop of phase shifter)

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摘要(中)

本論文主要是針對一維光子能隙(Photonic Bandgap簡稱PBG)結構能縮小尺寸的特性，來設計所需相位的延遲線，進而研製出相移器。相移器為剖風儀天線陣列提供相位移轉的重要關鍵零組件，主要的設計概念，在於首先設計所需相位的延遲線，接著配合高頻開關的切換，選擇所需相位的路徑。
PBG所以能縮小尺寸的原因主要為電路結構中等效的電感提供了慢波效應(slow wave effect)，由於這個慢波效應，使得PBG的電氣長度會比一般傳輸線長，因此在同樣電氣長度下，PBG的物理長度就會比一般傳輸線短，這樣就會使得所製作的相位偏移器整體的面積就會比較小。文中將會探討PBG電路所可以設計的參數，並整理出這些參數的規則，利用這些規則來盡量縮小電路的尺寸且達到符合所需要的相位。

摘要(英)

In the thesis, a design concept for the phase shifter using photonic bandgap(PBG)structure is proposed. PBG possesses a slow-wave characteristic caused by the equivalent inductive components. Due to the slow-wave effect, the electrical length of the PBG is increased. Therefore, the physical length of transmission lines can be shortened by inserting PBG while the original electrical length remains the same.
Sensitivity analysis is conducted on many design arguments of PBG. Based on the analysis, simple design rule of phase-delayed line using PBG is proposed. At the end, a 3 bits phase shifter is realized and verified by measurement in the thesis.

關鍵字(中)

★ 相移器
★ 延遲線
★ 一維光子能隙

關鍵字(英)

★ phase shifter
★ delay line
★ PBG

論文目次

目錄
摘要(中文)………………………………………………………………………I
摘要(英文)………………………………………………………………………II
致謝………………………………………………………………………………III
目錄………………………………………………………………………………IV
第一章緒論…………………………………………………………………1
1.1 簡介與研究動機………………………………………………………1
1.2 內容概要…………………………………………………………………4
第二章 Photonic Bandgap結構電路設計之延遲線…………………5
2.1 簡介………………………………………………………………………5
2.2 Matlab程式模擬一維PBG電路及實現…………………………7
2.2.1 ABCD矩陣與S參數……………………………………………7
2.2.2 Matlab程式模擬…………………………………………………12
2.2.3實現PBG電路架構與模型………………………………………14
2.2.4等效串接電感的模擬與驗證……………………………………16
2.2.5最後PBG結構的實現電路………………………………………20
2.3 通帶慢波效應的分析………………………………………………21
2.3.1單元網路間的傳輸線距離d對slow wave factor的影響………24
2.3.2單元網路加載個數對slow wave factor的影響…………………35
2.3.3加載單元網路之電感值大小對slow wave factor的影響………40
2.3.4結語………………………………………………………………44
2.4 延遲線的實現…………………………………………………46
第三章相移器的設計……………………………………………………51
3.1 簡介……………………………………………………………………51
3.2 相移器的基本原理與架構…………………………………………52
3.2.1基本原理…………………………………………………………52
3.2.2相移器架構………………………………………………………54
3.3 相移器的實現…………………………………………………………56
第四章結論…………………………………………………………………61
參考文獻…………………………………………………………………………62

參考文獻

參考文獻
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指導教授

丘增杰(Tsen-Chieh Chiu)

審核日期

2004-6-29

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