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研究生:林佑諭
研究生(外文):You-Yu Lin
論文名稱:平面型雙工器之設計方法研究
論文名稱(外文):Study on the Design Method of Planar Diplexer
指導教授:謝榮展謝榮展引用關係
指導教授(外文):Rong-Chan Hsieh
學位類別:碩士
校院名稱:華梵大學
系所名稱:電子工程學系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2006
畢業學年度:94
語文別:中文
論文頁數:96
中文關鍵詞:平面型雙工器相鄰頻道雙工器雙工器等效電路逐級開路調測法電腦最佳化法
外文關鍵詞:planar diplexercontiguous band diplexerequivalent circuit of diplexersequential open-circuit tuning methodcomputer optimization technique
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本篇論文主要在研究平面型雙工器之設計方法。首先提出兩種雙工器等效電路(底下分別稱為等效電路(一)及等效電路(二)),並成功開發出這兩種等效電路參數的綜合程式。本論文第二部份為利用等效電路參數及逐級開路調測法,開發一套平面型雙工器設計方法,使設計調測出的實際雙工器接近等效電路頻率響應。
雙工器等效電路(一)是由兩個集總元件所組成的濾波器,直接並接而成。設計的時候只需將綜合程式所需的參數與規格設定好,代入雙工器等效電路(一)綜合程式,藉由最佳化法調整電路參數,即可設計具完美響應的雙工器等效電路。而雙工器等效電路(二)是由集總元件(兩個濾波器)與散佈元件(T型接面)所組成的。設計雙工器時,首先設計T型接面,將T型接面模擬出的散射參數值,與綜合程式所需的參數及規格,代入雙工器等效電路(二)綜合程式,也可以設計具完美響應的雙工器等效電路。
由於等效電路(二)比較接近平面型雙工器的架構,所以本論文利用等效電路(二)的參數,設計平面型雙工器。利用綜合程式所產生的耦合係數矩陣及逐級開路調測法,可在全波分析軟體中設計兩個濾波器的尺寸。設計及模擬結果顯示,此方法可以輕易及很有效率地分別調測出實際濾波器尺寸。當濾波器完成後,再與T型接面組合成雙工器。為了使平面雙工器的響應,更接近雙工器等效電路的響應,可以進一步使用電腦最佳化法,採用逐級開路調測法的尺寸為初始值,利用全波分析軟體最佳化功能,使平面雙工器的響應更接近理想的響應。
本論文使用雙工器等效電路(一)的方法,分別設計不同頻道間隔的雙工器。也使用雙工器等效電路(二)的方法,設計多種相鄰頻道雙工器的等效電路,這些雙工器的T型接面具有不同長度的饋入線。最後設計並製作出三種平面型相鄰頻道雙工器,分別為(1)微帶線架構之相鄰頻道雙工器(採用微小髮夾型諧振器),(2)夾心帶線結構之相鄰頻道雙工器(採用微小髮夾型諧振器),(3)微帶線結構之相鄰頻道雙工器(採用步階阻抗型諧振器)。實際電路量測結果驗證,本論文所提出的平面型雙工器設計方法的可行性。
This thesis is devoted to the design method of planar diplexer. Two equivalent circuit of diplexer are proposed; they are named as equivalent circuit I and equivalent circuit II hereafter. The synthesis methods of these two equivalent circuits have also been developed successfully. The second part of this thesis is developing the design method of planar diplexer based on the equivalent circuit using the sequential open-circuit tuning method. This design method enables the responses of the designed diplexer close to those of the equivalent circuit.
The equivalent circuit I comprises two lump-element filters connecting in parallel. The parameters of this circuit can be optimally calculated from the synthesis program to satisfy the specifications of diplexer. Ideal response can be achieved for the equivalent circuit after synthesis procedure. The equivalent circuit II comprises two lump-element filters connected through distributed T-junction. Before the design of this second equivalent circuit, the s-parameters of the T-junction have to be obtained from simulation. The synthesis program combines these s-parameters and the two lump-element filters to optimally find the parameters of equivalent circuit II satisfying the specifications of diplexer. The equivalent circuit II also has ideal responses after synthesis.
This thesis employs the equivalent circuit II to design the planar diplexer because of its similarity to real diplexer. The two filters of diplexer can be designed on simulation software based on the equivalent circuit parameters, like the coupling coefficients, using the sequential open-circuit tuning method. The two filters can be easily designed by this method. The planar diplexer is then fromed by connecting the T-junction to the two designed filters. In order to make the responses of diplexer closer to those of equivalent circuit, computer optimization technique is employed to find adjust the diplexer. The diplexer after sequential tuning procedure serves as good initial guess. The planar diplexer can be optimally designed by the optimization function of simulation software.
This research has employed the synthesis program of equivalent circuit I to design several diplexers with different channel spacing. Several contiguous band diplexers, with different lengths of feed lines, are also designed by the synthesis program of equivalent circuit II. There planar contiguous band diplexers are designed and fabricated in this research. They are :1) microstrip diplexer with mini-hairpin resonators, 2) stripline diplexer with mini-hairpin resonators and 3) microstrip diplexer with step impedance resonators. The validity of the proposed design method is confirmed by the measurement results.
論文摘要…………………………………………………….………………I
ABSTRACT…………….………………..……………………………..…III
目錄……………….………………………….…………………………….V
圖錄……………………………………………………………...…….…VII
表錄………………………………….……………………….…………..XII
第一章 導論…………………………...…………………………………...1
第二章 理想雙工器等效電路(一)………………..………………………5
2.1 理想雙工器等效電路(一)分析…………..……………………...5
2.2 理想雙工器等效電路(一)綜合方法………..………………….12
2.3 雙工器等效電路(一)綜合結果....................................................15
2.3.1雙工器等效電路(一)綜合結果(四級)…………………...16
2.3.2雙工器等效電路(一)綜合結果(六級)…………………...24
2.3.3雙工器等效電路(一)綜合結果比較…………………….32
第三章 理想雙工器等效電路(二).............................................................34
3.1理想雙工器等效電路(二)分析…………..……………………..34
3.2理想雙工器等效電路(二)綜合方法…………………...……….38
3.3理想雙工器等效電路(二)綜合結果…………...……………….40
3.3.1 微帶線架構之相鄰頻道雙工器等效電路(二)綜合結
果……………………….……………………………….40
3.3.2 夾心帶線架構之相鄰頻道雙工器等效電路(二)綜合結
果………...…………………………………………….. 44
3.3.3 不同饋入線長度微帶線架構之相鄰頻帶雙工器等效電
路(二)綜合結果.................................................................47
第四章 平面型雙工器之設計………………………………….……...57
4.1平面型夾心帶線雙工器之設計(微小髮夾型)………....……..57
4.2平面型微帶線雙工器之設計(微小髮夾型)…………….….......71
4.3平面型微帶線雙工器之設計(步階阻抗)…………..…….….....76
第五章 模擬與量測結果……………………………………………........81
5.1微帶線架構之相鄰頻帶雙工器量測結果(步階阻抗).................81
5.2微帶線架構之相鄰頻帶雙工器量測結果(微小髮夾).................84
5.3夾心帶線架構之相鄰頻帶雙工器量測結果(微小髮夾)……... 87
第六章 結論………………………………………………………….…...91
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