臺灣博碩士論文加值系統

利用截線負載型開迴路諧振器來設計雙波段帶通濾波器，將具有較小之電路尺寸與可控制諧波頻率之優點。於本論文中，將利用截線負載型開迴路諧振器來設計2.45/5.25-GHz之雙波段帶通濾波器。
於本論文中，首先探討具截線負載型開迴路諧振器的雙波段帶通濾波器之設計理論。其次，分別設計及製作具電耦合與混合耦合截線負載型開迴路諧振器之雙波段帶通濾波器。最後，量測兩種雙波段帶通濾波器之特性，並將量測結果與模擬數值作比較。
由分析結果得知，兩種雙波段帶通濾波器皆具有極佳之濾波特性與極小之電路尺寸。因此，利用截線負載型開迴路諧振器設計之雙波段帶通濾波器適合應用於微波通訊系統。

The dual-band bandpass filter designed by stub-loaded open-loop resonators will have the advantages of compact size and controllable resonant frequency. In this thesis, the stub-loaded open-loop resonators are used to design the 2.45/5.25-GHz dual-band bandpass filters.
In this thesis, the theory of the design of dual-bandpass filter using stub-loaded open-loop resonators is analyzed firstly. Next, the dual-band bandpass filters with electric and mixed coupling stub-loaded open-loop resonators 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 analyzed results, it is noted that two dual-band bandpass filters have good performance and compact sizes. Therefore, the dual-band bandpass filters designed using stub-loaded open-loop resonators are suitable for microwave communication system applications.

目 錄
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 具截線負載型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 半波長微帶線諧振器6
2-3.1 傳統開迴路諧振器7
2-3.2 截線負載型開迴路諧振器8
2-4 雙波段帶通濾波器9
2-4.1 具開迴路諧振器10
2-4.2 具截線負載型開迴路諧振器10
2-5 耦合模型與耦合係數11
2-5.1 耦合模型之探討12
2-5.2 諧振器間之耦合係數16
第三章 雙波段帶通濾波器之設計31
3-1 簡介31
3-2 半波長微帶線諧振器31
3-3 建立耦合模型35
3-4 具電耦合結構之雙波段帶通濾波器36
3-4.1 電路設計36
3-4.2 各參數值之影響與最佳化40
3-5 具混合耦合結構之雙波段帶通濾波器43
3-5.1 電路設計44
3-5.2 各參數值之影響與最佳化46
第四章 雙波段帶通濾波器之製作與特性量測83
4-1 簡介83
4-2 電路佈局與製作83
4-3 具電耦合結構之雙波段帶通濾波器84
4-4 具混合耦合結構之雙波段帶通濾波器85
4-5 結果與討論86
第五章 結論94
參考文獻96

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