臺灣博碩士論文加值系統

本論文探討在V頻段波導管至同軸纜線之轉接元件的設計。首先設計V頻段波導管至同軸接頭轉接結構，此轉接設計採用Glass Bead作為同軸結構能量耦合至波導管的元件，為了減少電磁能量在轉接器中反射，因此在Glass Bead中心導體尾端套上碟型微調結構，透過碟型微調結構可以達到較寬使用通帶。
第二款設計則接續上一種轉接設計，將V頻段接頭置換成微帶線，使得微帶線與Glass Bead為垂直轉接的結構，此結構可增加轉換器與主動電路連結的便利性。為了避免同軸與微帶線在轉接時，場型的不匹配而造成大量損耗，因此使用基板偏心圓穿孔的方式來改善同軸與微帶線在轉接場型變化的情形。本論文將以有限元素法為基礎模擬軟體HFSS來執行模擬，並且以實作來驗證文中提出兩種轉接結構。

The research focuses on the design of waveguide-to-coaxial transitions at V-Band. The design consisted of two sections, the first of which is the transitions of waveguide-to-coaxial at V-Band transitions with Glass Bead being element as taking energy coupling to waveguide for reducing the reflection of electromagnetism energy in transformer. Therefore we put disk tune with on the end of center pin of Glass Bead which can make the much wider pass band.
The second section continues first kind of design of transformer which used microstrip line to replace V connector. The replace can make the microstrip line with the structure of vertical transformer and Glass Bead. This structure can improve convenience for transitions connecting with the active load. In order to avoid that the coaxial with microstrip line in transitions field does not match. So we use the way in eccentric perforates for improving the situation when coaxial transitions with microstrip line. A finite element method based commercial CAD package, HFSS, is chosen to conduct the required simulations .The results are verified experimentally.

中文摘要 i
英文摘要 ii
誌謝 ii
目錄 v
表目錄 vii
圖目錄 viii
第一章 序論 1
1.1 研究背景 1
1.2 研究動機與方法 2
1.3 論文架構 3
第二章 轉接器之基本原理與設計 4
2.1 轉接器之概述 4
2.2 傳輸線特性與架構 5
2.2.1 同軸纜線特性簡介 5
2.2.2 波導管特性簡介 7
2.3 同軸纜線至波導管耦合設計 8
2.3.1 環形天線磁場耦合 9
2.3.2 探針式電場耦合 10
2.4 轉接器之文獻探討 11
第三章 波導管至同軸纜線轉接設計 16
3.1 同軸探針之探討 16
3.2 波導管至V頻段同軸接頭轉接器 21
3.2.1 波導管至V頻段同軸接頭轉接之設計流程 21
3.2.2 探討碟型微調結構對轉接器之影響 29
3.3 量測系統、實作與量測 33
3.3.1 量測系統 33
3.3.2 Full two port 校正技術 (SOLT) 35
3.3.3 波導管至V頻段同軸接頭轉換器實作與量測 36
3.3.4 討論 39
3.4 以同軸結構耦合波導管至微帶線轉換器 39
3.4.1 微帶線特性簡介 39
3.4.2 微帶線損耗 41
3.4.3 同軸結構耦合波導管至微帶線轉換器之設計過程 42
3.4.4 以偏心圓基板貫穿孔改善轉換器之響應 46
3.5 同軸結構耦合波導管至微帶線轉換器實作與量測 54
3.6 改善同軸結構耦合波導管至微帶線轉換器之響應 60
3.6.1 改善轉換器響應之方法一 60
3.6.2 改善轉換器響應之方法二 61
3.6.3 討論 63
第四章 結論 64
參考文獻 65

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