臺灣博碩士論文加值系統

摘 要
於設計微波多工器時，多工器之頻道數目與頻道內之中心頻率、植入損失、折返損失及比例頻寬等皆為重要之考量依據。此外，如果採用平行耦合結構，將更容易設計與製作多頻道之微波多工器。於本論文中，首先我們採用平行耦合結構以設計切角型微波多工器，其次利用特性阻抗皆為50Ω之微帶線以設計圓弧型微波多工器，以改善多工器中各頻道之折返損失。
於本論文中，首先探討平行耦合式多工器之設計理論。其次，分別設計與製作兩種平行耦合式多工器。最後，實際量測多工器之特性並將量測結果與模擬數值作比較。

Abstract
In the design of microwave multiplexer, the number of channel, the center frequency, the insertion and return losses and fractional bandwith of each channel are important parameters to be considered. Besides, if the parallel-coupled structures are used, the microwave multiplexers with more channels can be easily designed and realized. In this thesis, the parallel-coupled structures are used to design the mitered-bend microwave multiplexer firstly, and then the radial-bend microwave multiplexer with 50Ωmicrostrip lines is designed to improve the return loss.
In this thesis, the theory of the design of parallel-coupled multiplexer is analyzed firstly. Next, two kinds of parallel-coupled multiplexers are designed and realized, respectively. Finally, the characteristics of the multiplexers are measured and compared with the simulation results.

目 錄
第一章 緒論
1-1 研究動機 1
1-2 文獻探討 2
1-3 內容概要 3
第二章 平行耦合式多工器之理論分析 4
2-1 簡介 4
2-2 準TEM傳輸線 4
2-3 平行耦合器 8
2-4 平行耦合式濾波器 13
2-5 平行耦合式多工器 15
第三章 平行耦合式多工器之設計與模擬 23
3-1 簡介 23
3-2 切角型平行耦合式多工器之設計 23
3-3 圓弧型平行耦合式多工器之設計 27
3-4 電腦輔助模擬 30
3-4.1 切角型平行耦合式帶通濾波器 31
3-4.2 切角型平行耦合式多工器 34
3-4.3 圓弧型平行耦合式帶通濾波器 35
3-4.4 圓弧型平行耦合式多工器 38
第四章 平行耦合式多工器之特性量測 59
4-1 簡介 59
4-2 電路佈局與量測步驟 59
4-3 電路特性量測 60
4-3.1 切角型平行耦合式多工器 60
4-3.2 圓弧型平行耦合式多工器 61
4-4 結果與討論 63
第五章 結論 84
參考文獻 86

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