# 臺灣博碩士論文加值系統

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 本論文分兩個部分，第一部分為第三章的頻寬與頻帶可調控之雙頻帶通濾波器，透過數學公式的分析與驗證，設計出一套可以調控頻帶與頻寬的完整設計流程，並利用指叉式電容補償的方法來解決平行耦合線在微帶線實作上奇偶模向數不一的問題。此濾波器的特點是傳輸零點直接出現在頻帶的兩旁以及截止帶上，因此能達成良好的濾波特性。 接著在第四章提出頻帶可調控之雙頻帶通濾波器，同樣是雙頻帶通濾波器，不過電路架構和第三章不同。它是由兩個單頻帶通濾波器組合而成一雙頻帶通濾波器，特點是兩個通帶的頻率位置可以分開調控，透過大量的模擬數據整理出圖表來方便設計，最後也是以微帶線的方式來實作。 上述電路均使用全波電磁模擬軟體進行模擬工作，並實際進行電路製作與量測。經由量測結果與電磁模擬相比較，確實驗證與理論有良好的一致性。
 This paper is divided in two parts, the first part introduce a dual band bandpass filter in chapter 3. By mathematical analysis and verification to complete a designing procedure, and using interdigital capacitance compensation to solve the phase difference between the even mode and odd mode of coupled lines. The advantage of this filter is the transmission zeros is right on the edge of passbands and the center of stopbands ccausing good filter effect.In chapter 4 also introduce a dual band bandpass filter,but with different structure to chapter 3. It is a dual band bandpass filter combined with two single band bandpass filter,the advantage of this filter is it can adjust the position of passband respectively.The circuits is designed with electromagnetic simulation software, and carry out to microstrip line,it have well consistency between theory and measurements results.
 第一章 緒論.............. ...................................................................................................1 1.1 研究動機....................................................................................................1 1.2 文獻探討....................................................................................................2 1.3 論文架構...................................................................................................3第二章 濾波器設計理論..............................................................................................5 2.1 散射參數...................................................................................................5 2.2 二埠網路的奇偶模態電路分析.............................................................. 7 2.3 平行耦合微帶線之分析.......................................................................... 8 2.4 步階阻抗諧振腔之分析........................................................................ 11 2.5 雙路徑分析............................................................................................ 17第三章 頻寬與頻帶比可調控之雙頻帶通濾波器................................................... 21 3.1 簡介........................................................................................................ 21 3.2 雙頻帶通濾波器分析.............................................................................22 3.2.1 傳輸零點分析..............................................................................23 3.2.2 通帶頻率位置..............................................................................28 3.2.3 頻帶調控......................................................................................32 3.2.3.1 通帶頻率比的調控.........................................................32 3.2.3.2 頻寬的調控.....................................................................34 3.3 設計實例.................................................................................................37 3.3.1 規格..............................................................................................37 3.3.2 模擬與實做........................................\.........................................37 3.3.2 進階應用......................................................................................47第四章 雙頻帶通濾波器設計....................................................................................49 4.1 簡介.........................................................................................................49 4.2 雙頻帶通濾波器分析.............................................................................49 4.2.1 奇偶模態電路分析法..................................................................51 4.2.2通帶分分析法.............................................................................. 55 4.3 設計實例.................................................................................................65第五章 結論................................................................................................................69參考文獻......................................................................................................................71
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 1 雙頻等功率分配器與雙頻帶通濾波器設計暨結合 2 具良好諧波抑制之單/雙頻帶通濾波器設計與多頻帶天線設計 3 具雙路徑結構雙頻帶通濾波器與雙頻帶天線設計

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