臺灣博碩士論文加值系統

利用非均勻阻抗之雙開迴路諧振器來設計雙波段帶通濾波器，具有易於調控諧振頻率與降低電路尺寸之優點。於本論文中，我們將分別利用無開路截線與具開路截線諧振器來設計2.4/5.2-GHz之雙波段帶通濾波器。
於本論文中，首先，探討雙開迴路諧振器之特性。其次，說明無開路截線與具開路截線之雙波段帶通濾波器的設計理論。接著，分別設計及製作無開路截線與具開路截線之雙波段帶通濾波器。最後，分別量測兩種雙波段帶通濾波器之電路特性，並比較量測結果與模擬數值。
由研究結果可得知，兩種雙波段帶通濾波器之特性皆能符合設計規格。另一方面，相較於無開路截線之雙波段帶濾波器，由於具開路截線之雙波段帶通濾波器多了截線，因此較容易調整第二波段之中心頻率，並且可以縮小大約7%之電路尺寸。

The design of dual-band bandpass filter using dual open-loop resonators with non-uniform structure will have the advantages of easy to adjust the resonant frequency and reduce the size of the circuit. In this thesis, the dual open-loop resonators without and with open-circuit stubs are used to design the 2.4/5.2-GHz dual-band bandpass filters, respectively.
In this thesis, the characteristics of the dual open-loop resonators will be analyzed firstly. Next, the theory of the design of dual-band bandpass filter without and with open-circuit stubs are studied. Moreover, the dual-band bandpass filters without and with open-circuit stubs are designed and realized, respectively. Finally, the characteristics of the two dual-band bandpass filters are measured and compared with the simulation results.
From the research results, it’s found that the performances of both dual-band bandpass filters conform to the design specification. On the other hand, compared with the dual-band bandpass filter without open-circuit stub, the dual-band bandpass filter with open-circuit stub is easier to adjust the center frequency of the second band, and the size of the circuit can be reduced about 7%, since the latter one contains open-circuit stub which provides more adjustable parameters.

摘要......................I
Abstract......................II
目次......................III
圖次......................V
表次......................VII
第一章 緒論......................1
1-1 研究動機......................1
1-2 文獻探討......................2
1-3 內容概要......................3
第二章 具雙開迴路諧振器之雙波段帶通濾波器..................4
2-1 簡介......................4
2-2 低通濾波器之原型電路......................4
2-3 雙開迴路諧振器......................5
2-3.1 無開路截線結構......................6
2-3.2 具開路截線結構......................7
2-3.3 非均勻阻抗結構......................8
2-4 耦合結構......................8
2-5 雙波段帶通濾波器之架構......................9
2-5.1 無開路截線之電路......................9
2-5.2 具開路截線之電路......................9
第三章 雙波段帶通濾波器之設計......................16
3-1 簡介......................16
3-2 雙開迴路諧振器......................16
3-2.1 無開路截線諧振器之設計......................16
3-2.2 具開路截線諧振器之設計......................18
3-3 無開路截線之雙波段帶通濾波器......................20
3-3.1 電路設計......................21
3-3.2 各參數值之影響與最佳化......................23
3-4 具開路截線之雙波段帶通濾波器......................26
3-4.1 電路設計......................27
3-4.2 各參數值之影響與最佳化......................28
3-5 兩種濾波器的模擬特性之比較......................33
第四章 雙波段帶通濾波器之製作與量測......................64
4-1 簡介......................64
4-2 電路佈局與製作......................64
4-3 無開路截線之雙波段帶通濾波器......................64
4-4 具開路截線之雙波段帶通濾波器......................65
4-5 結果與討論 66
第五章 結論......................73
參考文獻......................74

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