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研究生:吳尚興
研究生(外文):Shang-Shing Wu
論文名稱:平衡式雙頻雙工器與濾波天線之設計
論文名稱(外文):Design of Balanced Dual-band Diplexers and Filtering Antenna
指導教授:李清和李清和引用關係
指導教授(外文):Ching-Her Lee
學位類別:碩士
校院名稱:國立彰化師範大學
系所名稱:電信工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
畢業學年度:103
語文別:中文
論文頁數:45
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本論文主要的研究在於設計平衡式雙頻雙工器與平衡式濾波天線,在設計濾波器的部分選用微帶線步階式阻抗共振器以及槽線步階式阻抗共振器,關於設計天線的部分則使用偶極天線來當作主要之設計。論文內容一共分成四個部分,第一部分是使用步階式阻抗共振器來設計一個單頻帶通濾波器,並在最中間的步階式阻抗共振器使用貫地接孔的概念來錯開各級共振器的倍頻使得共模響應得到抑制。
在第二部分的研究中,以第一部分為基礎進階的設計平衡式雙頻帶通濾波器。與第一部分相同以微帶線共振器當作主要設計之雙頻帶通濾波器的元件,採用三階共振器以達到足夠之頻寬。其中心概念為選定兩個四分之一波長共振器以及一個二分之一波長共振器,利用對稱面的特性錯開共模時各級濾波器之工作頻率,以達到共模時優良的抑制。差模部分利用調整各級共振器之間的間距以及L型饋入線的長短達到良好的阻抗匹配使得差模時通帶響應良好。
在第三部分的研究中,我們利用第二部分所使用之平衡式雙頻濾波器搭配兩T-junction之間插入SIR以抑制傳輸通帶對邊之訊號,以利達到量好的隔離度,詳細之物理機制說明將於本文後續說明。
在第四部分的研究中,我們將平衡式帶通濾波器與偶極天線整合成一模組,其濾波器與天線之間的阻抗匹配將成為研究重點,吾人主要設計一步階式槽線共振器與偶極天線之整合,再探討之間的耦合機制。
預期本論文所完成之濾波天線及平衡式雙頻帶通濾波器可應用於實際之相關微波電路中,所提出之設計方法可作為此方面研發人員之有用參考。

This main objective of this thesis is the study and design of balanced bandpass filters (BPF) and filtering antenna. Filter is adopted by stepped-impedance slot-line resonators or even uses stepped-impedance microstrip resonators. About the design of the antenna portion is used as the primary of a dipole antenna design . A total content of the paper is divided into four parts . The first part is to use stepped-impedance resonators to design a bandpass filter . And a stepped-impedance resonator use the concept of via to stagger the harmonic of resonators to suppress common mode response.
In the second part of this thesis, base on the first part, to design a balanced dual-band bandpass filter. Using the same microstrip line resonator as the main design of the balanced dual-band bandpass filter of the first section. Using third-order resonator to achieve enough bandwidth. The central concept is to select two quarter-wave resonator and one half-wave resonator. When utilizing the characteristics of the symmetry plane shifted common-mode operating frequency filters of various grades to make good common-mode supression. When differential mode, adjust the distance of resonators and the length of L-type feed-line to make good impedence matching to achieve good DM performance.
In the third part of this thesis, we used the balanced dual-band bandpass filter of the second part. And we insert the SIRs between T-junction to suppress the signals of each other band to make high isolation. Detailed description of the physical mechanism will be explained later in this tutorial.
In the fourth part of this thesis, we will integrate balanced bandpass filter and dipole antenna. It’s impedance matching between filters and antennas will be the major focus.
Results obtained in this research can be applied to commercially practical RF and micromave systems. The techniques presented in this research are expected to serve as a useful reference for microwave designers in this and related research fields.

中文摘要 ii
Abstract iii
誌 謝 v
圖目錄 vii
表目錄 ix
第一章 緒論 1
1-1 研究動機 1
1-2 文獻探討 2
1-3 論文大綱 4
2-1 以SIR設計之平衡式帶通濾波器 5
2-2 以SIR設計之平衡式帶通濾波器的模擬結果 7
第三章 平衡式雙頻雙工器之設計 10
3-1平衡式雙頻濾波器之設計 10
3-2平衡式雙頻雙工器之設計 15
第四章 平衡式濾波天線之設計 26
4-1 平衡式濾波天線設計概念 26
4.2 以槽線及微帶混合結構設計之平衡式濾波天線 27
4.3 模擬與量測結果及討論 29
第五章 結論 40


圖目錄
圖1.1、RF超外差接收機之方塊圖 1
圖2.1、平衡式帶通濾波器之結構圖 8
圖2.2、平衡式濾波器模擬結果: (a)差模與(b)共模頻率響應圖 9
圖3.1、圖3.1 2.45/5.25 GHz平衡式雙頻濾波器架構 13
圖3.2、圖3.1平衡式雙頻濾波器之等效半電路 13
圖3.3、SIR A及SIR B共振器之頻譜分布圖 14
圖3.4、平衡式雙頻帶通濾波器模擬之(b)共模響應圖 15
圖3.5、使用T-junction連接之平衡式雙頻雙工器架構圖 16
圖3.6、調整T-junction時之Smith Chart圖 (a) θ1+θ3=18.5 mm (b) θ1+θ3=22 mm 17
圖3.7、具雙頻通道隔離機制之平衡式雙頻雙工器架構圖 18
圖3.8、T-junction兩支臂各插入一個SIR並適當調整後之隔離度Smith Chart響應 19
圖3.9、插入SIR 1於T-junction支臂之特性探討 23
圖3.10、平衡式雙頻雙工器電路圖 23
圖3.11、平衡式雙頻雙工器之(c)隔離度響應圖 24
圖4.1、天線取代濾波器最後一級電路之示意圖 27
圖4.2、平衡式濾波天線之架構 31
圖4.3、所提出之平衡式濾波天線之等效半電路圖 31
圖4.4、(a)正中心饋入時之電流分布圖與(b)偏移中心一小段距離之電流分布圖 32
圖4.5、圖4.2中當L = 5、5.95及8.45 mm時,天線與槽線共振器之相對位置…....32
圖4.6、圖4.5中不同L長度時之濾波天線插入損失......................................................33
圖4.7、總體濾波天線之S11………………………………………………………………33
圖4.8、(a)xy-plane場形圖 34
圖4.8、(b)yz-plane場形圖 34
圖4.8、(c)xz-plane場形圖 35
圖4.9、整體濾波天線在通帶內之輻射增益 36
圖4.10、整體濾波天線的輻射效率 36
圖4.11、為所設計之平衡式濾波天線之實作(a)正面(b)背面圖 38
圖4.12、平衡式饋入微帶偶極天線之示意圖 38
圖4.13、平衡式饋入微帶偶極天線之響應圖 39
圖4.14、加入兩個陷波共振器之平衡式濾波天線 39
圖4.15、加入陷波共振器之比較圖 39


表目錄
表1、本設計之平衡式四頻雙工器與各文獻中的雙頻者之規格比較表 25

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