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研究生:許皓哲
研究生(外文):Hao-CheHsu
論文名稱:多模諧振器設計與其濾波器應用
論文名稱(外文):Multimode Resonators and Their Filter Applications
指導教授:蔡智明蔡智明引用關係
指導教授(外文):Chih-Ming Tsai
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電腦與通信工程研究所
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:2020
畢業學年度:108
語文別:中文
論文頁數:97
中文關鍵詞:微波濾波器多模諧振器諧振頻率特性阻抗
外文關鍵詞:microwavefiltermultimode resonatorresonant frequencycharacteristic impedance
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使用多模諧振器設計微波濾波器大致可分成兩種方法,第一種為先設計多模
諧振器的電路結構及諧振點,再透過調整輸出入埠的饋入以達成整體濾波器的設
計,第二種則為使用近似或精確的合成理論直接合成出整體濾波器的元件值,本
論文主要探討的是第一種設計方法,以等長性步階阻抗多模諧振器的諧振頻率與
特性阻抗為研究重點,發現多模諧振器不只是要對諧振點位置進行設計,諧振器
的特性阻抗值對於整體濾波器響應也非常重要,最後並以圖表的方式呈現如何使
用多模諧振器來設計濾波器。另外,也以諧振頻率位置及特性阻抗值這兩個重要
的設計要點,來進行等長性多模諧振器的替換,提出以非等長性步階阻抗諧振器
及並聯短路殘段諧振器兩種結構,此達到縮小濾波器長度的效果。最後,本論文
以電磁模擬與電路實作完成了設計圖表與相關設計流程的驗證。
The design methods of microwave filters using multimode resonators can generally be divided into two categories. One is to design the structure and resonant frequencies of the multimode resonator first, and then the couplings to input/output ports are adjusted to complete the design. The other is to use approximate or exact synthesis methods to derive all the component values of the filter directly. This thesis mainly studies the first method, and focuses on the effects and designs of the resonant frequencies and characteristic impedances of commensurate step-impedance resonators. It is found that not only the resonant frequencies, but also the characteristic impedances of the multimode resonators are very important design parameters. Design graphs and tables are created to help the design of these kinds of multimode resonator filters. Furthermore, it is proposed to replace commensurate resonators with non-commensurate ones or shunt short-stub resonators, in order to reduce the overall filter size. By keeping the resonant frequencies and the characteristic impedance of the first transmission-line section unchanged, it is found the passband responses are still good after these replacements. Finally, all the above studies are verified by electromagnetic simulations and real circuit measurements.
摘要 I
誌謝 XVII
目錄 XVIII
表目錄 XX
圖目錄 XXI
第一章 緒論 1
1-1 研究動機 1
1-2 論文簡介 2
第二章 使用多模諧振器設計濾波器 3
2-1 步階阻抗多模諧振器 3
2-2 透過經驗調整設計多模諧振器濾波器 6
2-3 精確合成理論設計多模諧振器濾波器 7
第三章 傳輸線多模諧振器特性阻抗之重要性分析 12
3-1 傳輸極點位置之影響 12
3-2 使用對稱阻抗諧振器之濾波器設計 23
3-2-1 四階濾波器設計 25
3-2-2 五階濾波器設計 32
3-3 利用諧振點設計諧振器元件值 35
3-3-1 六階濾波器設計 48
3-4 使用非對稱阻抗諧振器之濾波器設計 53
第四章 替換等長性步階阻抗多模諧振器之濾波器設計 64
4-1 使用非等長性諧振器之四階濾波器設計 64
4-2 使用並聯短路殘段諧振器之五階濾波器設計 68
第五章 濾波器實作 73
5-1 四階濾波器實作及其誤差分析討論 73
第六章 結論與未來展望 89
6-1 結論 89
6-2 未來展望 90
參考文獻 92
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