臺灣博碩士論文加值系統

截線負載型諧振器具有之優點，包含容易調整諧波頻率與可以縮小電路尺寸。此外，利用截線負載型步階阻抗諧振器設計之雙波段帶通濾波器，將可以更容易調整第二波段之中心頻率，以及更進一步縮小電路尺寸。於本論文中，我們將分別利用截線負載型均勻阻抗與步階阻抗諧振器來設計2.4/5.2-GHz之微小型雙波段帶通濾波器。

於本論文中，首先，探討截線負載型諧振器之特性。其次，探討具截線負載型均勻阻抗與步階阻抗諧振器的雙波段帶通濾波器之設計理論。接著，分別設計及製作具截線負載型均勻阻抗與步階阻抗諧振器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，並將量測結果與模擬數值作比較。

由研究結果得知，兩種雙波段帶通濾波器皆具有極佳之特性。再者，具截線負載型步階阻抗諧振器之雙波段帶通濾波器，由於可以調整的參數比較多，因此比較容易調整第二波段之中心頻率。此外，相較於具截線負載型均勻阻抗諧振器之雙波段帶濾波器可以縮小大約13%之電路尺寸。


關鍵詞：雙波段帶通濾波器、截線負載型諧振器、均勻阻抗、步階阻抗。

The stub-loaded resonator has the advantages, including the easily adjustable harmonic frequency and the compact size. Besides, the dual-band bandpass filter designed by using the stub-loaded stepped-impedance resonators will easily adjust the center frequency of the second band and has the more compact size. In this thesis, the stub-loaded uniform-impedance and stepped-impedance resonators are used to design the 2.4/5.2-GHz compact dual-band bandpass filters, respectively.

In this thesis, the characteristics of the stub-loaded resonators will be analyzed firstly. Next, the theory of the design of stub-loaded uniform-impedance and stepped-impedance resonators is studied. Moreover, the dual-band bandpass filters with stub-loaded uniform-impedance and stepped-impedance 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 research results, it is found that both dual-band bandpass filters have good performance. Moreover, the dual-band bandpass filter with stub-loaded stepped-impedance resonators has more adjustable parameters; it is easier to adjust the center frequency of the second band than the other one. Besides, the size of the dual-band bandpass filter with stub-loaded stepped-impedance resonators can be reduced about 13% as compared with the dual-band bandpass filter with stub-loaded uniform impedance resonators.


Keywords: dual-band bandpass filter, stub-loaded resonator, uniform impedance, stepped impedance.

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 具截線負載型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 截線負載型諧振器 6
2-3.1 均勻阻抗諧振器 6
2-3.2 步階阻抗諧振器 7
2-4 耦合結構 8
2-5 雙波段帶通濾波器之架構 9
2-5.1 具均勻阻抗諧振器之電路 9
2-5.2 具步階阻抗諧振器之電路 10
第三章 雙波段帶通濾波器之設計 17
3-1 簡介 17
3-2 截線負載型諧振器 17
3-2.1 均勻阻抗諧振器之設計 17
3-2.2 步階阻抗諧振器之設計 20
3-3 具均勻阻抗諧振器之雙波段帶通濾波器 22
3-3.1 電路設計 22
3-3.2 各參數值之影響與最佳化 24
3-4 具步階阻抗諧振器之雙波段帶通濾波器 28
3-4.1 電路設計 28
3-4.2 各參數值之影響與最佳化 30
3-5 兩種濾波器的模擬特性之比較 35
第四章 雙波段帶通濾波器之製作與量測 74
4-1 簡介 74
4-2 電路佈局與製作 74
4-3 具截線負載型均勻阻抗諧振器之雙波段帶通濾波器 74
4-4 具截線負載型步階阻抗諧振器之雙波段帶通濾波器 75
4-5 結果與討論 75
第五章 結論 81
參考文獻 83

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