基於共耦合窗及複合左右手共振器之四分之一模基板合成波導帶通濾波器

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姓名

曲立恆(Chu Li Heng) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

基於共耦合窗及複合左右手共振器之四分之一模基板合成波導帶通濾波器
(Quarter-Mode SIW Bandpass Filter with Common Coupling Window and CRLH Resonator)

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摘要(中)

本研究採用基板合成波導技術實現三個不同的帶通濾波器，三片電路階使用四分之一模基板合成波導腔體。第一片電路是使用新的耦合結構「共耦合窗」實現，使用三個腔體疊接並將傳統耦合窗結構以共耦合窗結構取代，此結構能額外提供一個於通帶右側的傳輸點，並提升響應表現，且因為耦合範圍變大的緣故，在頻寬的設計上能更彈性，可分別實現窄頻中頻及寬頻之響應。第二片電路將第二級共振器腔體以複合左右手共振器取代，透過複合左右手共振器能提供與傳統共振器相反相位的特性，可在全部耦合皆為磁耦合的情況下合成傳輸零點在通帶左側的響應，同時擁有不錯的電路表現。第三片電路基於第二片電路結構，再額外增加一個四分之一模基板合成波導腔體，透過適當調整耦合窗的位置及腔體的長寬比，合成兩通帶皆具有高獨立調整性的雙通帶響應，並且具有兩個傳輸零點於通帶與通帶之間，提升通帶間的抑制效果及提升選擇度。

摘要(英)

Three different bandpass filters based on substrate integrated waveguide (SIW) technology are present in this thesis, where each circuit utilizes a quarter-mode SIW cavity. The first circuit employs a novel coupling structure called the "common coupling window," achieved by cascade three cavities and replacing the traditional coupling window with common coupling window. This structure provides an additional transmission zero on the right side of the passband, enhancing the response performance. Moreover, due to the increased coupling region, it offers more flexibility in bandwidth design, capable of achieving responses for both narrow-band mid-band and wide-band. In the second circuit, the second cavity is replaced with a composite-left-right-hand (CRLH) resonator. By utilizing the CRLH resonator, which provides characteristic with opposite phase to traditional resonator, it synthesizes a response with a transmission zero on the left side of the passband while all coupling are magnetic coupling. It also maintain good circuit performance. The third circuit, based on the structure of the second circuit, additionally incorporates another quarter-mode SIW cavity. By appropriately adjusting the position of the coupling window and the length-to-width ratio of the cavity, it synthesizes a dual-band response with high independence for both passbands. Furthermore, it features two transmission zeros between the passbands, enhancing the suppression between passbands and improving selectivity.

關鍵字(中)

★ 濾波器
★ 共耦合窗

關鍵字(英)

★ filter
★ common coupling window

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 ix
第一章緒論 1
1-1 濾波器簡介 1
1-2 研究動機 3
1-3 文獻回顧 5
1-3-1 單頻帶帶通濾波器 5
1-3-2 雙頻帶帶通濾波器 6
1-4 章節概述 6
第二章基板合成波導簡介 7
2-1 四分之一模基板合成波導 7
2-2 taper轉接結構 10
第三章具共耦合窗結構單頻帶帶通濾波器 12
3-1 三階四分之一模基板合成波導帶通濾波器原理 12
3-2 帶通濾波器架構 14
3-3 外部品質因數萃取 15
3-4 利用Coupling matrix設計理想響應 18
3-5 模擬與量測結果 24
第四章引入CRLH共振器之單頻帶與雙頻帶帶通濾波器 29
4-1 CRLH共振器特性介紹 29
4-2 參數萃取 33
4-3 具CRLH共振器單頻帶帶通濾波器模擬與量測結果 37
4-4 雙頻帶帶通濾波器架構 41
4-5 參數萃取 43
4-6 雙頻帶帶通濾波器模擬與量測結果 47
第五章結論 53
第六章參考文獻 54

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指導教授

凃文化(Tu Wen Hua)

審核日期

2024-7-26

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