臺灣博碩士論文加值系統

本篇論文主要在說明矩形波導管T形接面等效電路之萃取及其運用在帶止濾波器的設計。首先，提出一套方法，利用全波分析軟體所得的散射參數，萃取出T形接面等效電路原件值。並利用此方法建立各種尺寸T形接面的等效電路資料庫。本研究利用此資料庫，開發一套矩形波導管帶止濾波器的設計方法。首先，運用資料庫可以快速求得與截止帶相關的濾波器尺寸。再使用鏡像參數法取得相鄰T接面間的距離。利用以上的方法可以得到濾波器的尺寸。最後，本文設計五階矩形波導管帶止濾波器，並以實驗量測來驗證本方法的可行性。

This thesis is devoted to the extraction of the equivalent circuit of rectangular waveguide T-junction and its application to the design of bandstop filter. A method is first proposed to extract the equivalent circuit from the scattering parameters obtained from full-wave simulations. The database of the equivalent circuit of a series of T-junctions is then constructed. The design method of bandstop filter is developed based on this database. In this design method, the sizes related to the T-junctions are designed from the stopband specifications of the filter. The distance between adjacent T-junctions is determined from image impedance method. A five-pole rectangular waveguide bandstop filter is designed using the proposed method. Good experimental measurement results validate the proposed method.

第一章 導論
第二章 理想帶止濾波器等效電路
2.1理想帶止濾波器等效電路
2.2理想帶止濾波器等效電路模擬
第三章　矩形波導管T型接面不連續結構等效電路
3.1原件的萃取方法
3.1.1全波分析軟體waspnet模擬
3.1.2資料庫的推導
3.2任意取三高度求解資料庫的影響
3.3 Ba, Gb, Bb, Gc, Bc, Gd, Bd的結果
3.4 T接面不連續結構等效電路的結果
第四章　矩形波導管帶止濾波器尺寸設計
4.1矩形波導管帶止濾波器截止帶設計
4.2矩形波導管帶止濾波器通帶設計
4.2.1雙埠網路的鏡像導納與轉換函數
4.2.2鏡像參數法設計濾波器通帶
4.3矩形波導管帶止濾波器模擬結果
第五章 矩形波導管帶止濾波器實作與量測
5.1矩形波導管帶止濾波器實作
5.2矩形波導管帶止濾波器量測結果分析與比較
第六章 結論

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