臺灣博碩士論文加值系統

本論文主旨所探討的內容分為兩種，其一為探討基板合成共振波導腔體結構設計之具負耦合縮小化Trisection全模態圓形基板帶通濾波電路以及縮小化半模態Trisection矩形基板帶通濾波電路，其二為縮小化矩形基板雙工器。基板合成波導腔體結構概念出自於傳統金屬共振腔體，其不同之處在於能量在基板合成波導腔體之介質中傳輸並使電磁波不流失。基板合成波導具有低損耗、低輻射以及高品質因素等優點，結構已經被廣泛的利用在微波電路上，而基板合成波導腔體也承襲了這些優點，並改良成更簡單設計、更容易與其他電路作結合之電路結構。在文章中提及的電路接以50 Ω之SMA接頭饋入能量。
第一種電路有兩種設計其一為具負耦合之縮小化Trisection全模態圓形基板帶通濾波電路，其二為縮小化半模態Trisection矩形基板帶通濾波電路。全模態設計的結構為平面式結構有兩層不同高度之基板，其電路結構除了在腔體內增加金屬圓盤及短路銅柱使其改變共振腔電場分布並降頻之外，在上層金屬面加入負耦合槽線並打入從上層金屬貫穿至下層金屬之負載銅柱，使傳輸零點從右側移至通帶左側。半模態設計的結構，其電路設計改良自平面式結構，將其中一個腔體以堆疊之方式堆疊，要使此結構能實現需要使用四層基板，其上半部分為兩個半模態腔體，下半部為全模態腔體，並在中間開耦合槽，使其相互耦合。半模態腔體用意是在其電場最強之處剖半，其視為虛接地，以此方式能在不改變頻率之情況下降低腔體面積。
第二種電路設計，其除了使用前面之降頻結構外，並且改良了其短路銅柱使其原本是一排的環狀短路銅柱，改變為有擺置順序及位置之短路銅柱以此方式作出具有雙頻結構之腔體。並且在其雙頻結構濾波器上方擺置兩個與其對襯及對應頻率之基板合成波導腔體，以此堆疊方式，並且在上下腔體之間開耦合槽以解決其耦合路徑，最後以上述結構來製作縮小化設計之基板合成雙工器。

The content of this thesis is divided into two categories, one is the negative coupling miniaturized trisection full mode filter and the miniaturized trisection half mode filter, and the other is the miniaturized duplexer. The SIWC which built by the print circuit board (PCB) technology is operated under the evanescent mode resonance. A large capacitance loading together with the substrate cavity's normal direction transmission line mode create an extra low frequency evanescent mode resonance. This evanescent mode may have resonance frequency as low as 1/6 of its conventional counterpart SIWC's TE101 mode's resonance
The second circuit design, in addition to using the previous reduced frequency structure, and improved its shorted copper post to have a dual band structure cavity. And design two substrate integrated waveguide cavities corresponding to the frequency. Finally, the duplexer is fabricated in the above structure.

目錄

中文摘要
英文摘要
誌謝
目錄
表目錄
圖目錄
第一章 序論
第二章 縮小化設計之Trisection基板合成波導腔體帶通濾波器
2-1 基板合成波導腔體之理論分析
2-2 基板合成矩形共振腔之理論分析
2-3 基板合成圓形共振腔之理論分析
2-4 縮小化濾波器之電路分析
2-5 耦合係數分析
2-6 全模態縮小化設計之Trisection基板合成波導腔體帶通濾波器
2-7 半模態縮小化設計之Trisection基板合成波導腔體帶通濾波器
第三章 基板波導腔體雙工器之縮小化設計
3-1 縮小化雙頻帶基板合成波導腔體之理論分析
3-2 縮小化設計之基板合成波導腔體雙工器
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