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研究生:莊嘉成
研究生(外文):Chia-Cheng Chuang
論文名稱:三階交錯耦合微帶線帶通濾波器之研製
論文名稱(外文):Design of Microstrip Trisection Cross-Coupled Bandpass Filters
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:電機工程學系
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:2002
畢業學年度:90
語文別:中文
論文頁數:90
中文關鍵詞:平面濾波器交錯耦合非對稱響應I字形諧振器廣義Chebyshev
外文關鍵詞:Planar filterCross-CoupledAsymmetric responseI-shaped resonatorGeneralized Chebyshev
相關次數:
  • 被引用被引用:5
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  • 下載下載:375
  • 收藏至我的研究室書目清單書目收藏:0
傳輸響應非對稱之濾波器相當適合應用在雙工器的設計上,因為它可以縮減防護帶頻寬,使頻率的使用更有效率。三階交錯耦合架構為適合實現非對稱傳輸響應的一種方式,因為它可以在通帶外側產生一個傳輸零點,使旁波帶獲得良好的抑制,另一方面在通帶又不會造成太大的插入損失,適當地改變耦合機制,則可控制傳輸零點頻率在通帶的高頻或低頻側。
在本論文中濾波器設計採用諧振器耦合型式,並實作成微帶線電路。為了縮小電路面積,本論文參考已發表之開路環式濾波器結構,發展出一種I字形諧振器,可埋設在其他兩諧振器之間,其動作原理類似步階阻抗諧振器,所以對高階諧振模式的抑制有些幫助,而電路佈局經由扭曲及壓縮後變的相當緊實,近端阻絕帶的傳輸抑制也因而增加不少。

Filters with asymmetric responses are very suitable for duplexer applications because they reduce the guard bandwidth and hence make the use of bandwidth more efficient. Trisection cross-coupled structures may implement responses of this kind because a transmission zero is created on one side of the passband and therefore make the side-band suppression better. Besides, the insertion loss on the passband is almost unchanged. The zero frequency could be controlled to be on the high side or the low side of the passband by modifying the coupling configuration adequately.
In this thesis, filters of resonator type are designed and implemented by using microstrip. To reduce the circuit size, an I-shaped resonator is designed to be surrounded by the other two resonators. The I-shaped resonator is useful in the suppression of high-order resonant modes because it is similar to stepped-impedance resonators. The circuit layout becomes more compact after some modifications, and the transmission suppression on the close-in stopband is therefore improved.

第一章 緒論.............................................1
第二章 廣義Chebyshev濾波器函數..........................4
2-1 簡介.............................................4
2-2 函數之推導.......................................5
2-3 濾波器規格與零點位置之考量......................15
第三章 三階交錯耦合濾波器..............................22
3-1 簡介............................................22
3-2 阻抗與導納倒轉器................................22
3-3 低通電路原型....................................27
3-3-1 奇、偶模式分析..............................27
3-3-2 低通原型元件值之合成........................32
3-4 帶通濾波器設計參數之合成........................41
3-5 帶通Lumped元件電路..............................48
第四章 平面式三階交錯耦合濾波器實例....................55
4-1 開路環式濾波器...................................57
4-2 Tapped Line輸入及輸出點的設計....................63
4-3 I字形諧振器之應用................................65
4-4 零度饋入技術之應用...............................78
第五章 結論與展望......................................81
參考文獻................................................83
附錄A...................................................86
附錄B...................................................88

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