臺灣博碩士論文加值系統

使用全波電磁模擬軟體(HFSS)以及網板印刷技術，在高品質因數氧化鋁(Al2O3)陶瓷基版上分別製作可以應用在WLAN與行動通訊系統上的一個雙頻帶通濾波器和一個使用U形缺陷接地結構(DGS)的雙模帶通濾波器。其中，雙頻帶通濾波器是由置入開路殘帶的饋入線和步階阻抗共振器(SIR)所組成的，此開路殘帶可以激發三個額外的傳輸零點，並且，中心頻率和諧波都可以藉由SIR來控制。另一方面，本論文也將再設計一個結構簡單且含有一個缺陷接地結構來激發衰減模的雙模帶通濾波器，並詳盡的討論此DGS結構之改變所造成的耦合效應。最後，由量測結果可以發現，此二種濾波器皆適合應用於無線區域網路和行動通訊系統之中。

The novel dual-band bandpass filters and dual-mode bandpass filters using U-shaped defected ground structure (DGS) are proposed on the high quality factor Al2O3 ceramic substrates. By the use of full-wave EM simulator (HFSS) and screen-printing technique, the dual-band bandpass filters and dual-mode bandpass filters were developed on the Al2O3 substrates. In addition, the dual-band bandpass filters were combined by a open stub and a stepped impedance resonator (SIR), and three extra transmission zeros could be excited by this open stub in the feed line, moreover, the center and harmonic frequencies could also be controlled by the SIR. On the other way, a novel dual-mode bandpass filter was proposed in this thesis too, which involved a defected ground structure (DGS) and was used to excite the degenerate modes. By changing of the dimension of DGS, the coupling between degenerate modes would be investigated in detail. Finally, these two filters are suitable for the applications of wireless local-area network (WLAN) and mobile communication systems

摘　　要 I
ABSTRACT II
致 謝 III
目次 IV
第一章 簡介 1
1.1 研究動機 1
1.2 文獻回顧 2
1.3 章節概要 4
第二章 濾波器基礎設計理論 5
2.1 簡介 5
2.2 集總式濾波器理論分析 5
2.2.1 濾波器種類介紹 5
2.2.2 低通濾波器設計方法 8
2.2.3 利用阻抗與導納反轉器設計濾波器[28] 12
2.3分散式濾波器理論分析 18
2.3.1 傳輸線共振器 18
2.3.2 阻抗與導納反轉器 20
2.4步階式阻抗共振器理論分析 21
第三章 實驗流程與基版介紹 25
3.1 濾波器實驗流程 25
3.2 基版介紹 25
第四章 新型雙頻帶通濾波器設計 27
4.1前言 27
4.2 具有帶拒功能饋入線設計 27
4.3步階式阻抗共振器結構設計 35
4-4結果與討論 38
第五章 新穎雙模帶通濾波器 41
5.1前言 41
5.2雙模態濾波器結構原理[16] 41
5.3 U型缺陷接地結構雙模帶通濾波器設計 44
5.4 結果與討論 51
第六章 結論 54
參考文獻 55

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