臺灣博碩士論文加值系統

利用彎折的步階阻抗諧振器來設計雙波段帶通濾波器，將具有可調整諧波頻率與較小電路尺寸之優點。於本論文中，我們將利用U型步階阻抗諧振器來設計雙波段帶通濾波器。
於本論文中，首先，探討具U型步階阻抗諧振器的雙波段帶通濾波器之設計理論。其次，分別設計具U型步階阻抗諧振器的傳統型、縮小型與進階型雙波段帶通濾波器。最後，製作縮小型與進階型雙波段帶通濾波器，並量測其特性。
由分析結果得知，兩種帶通濾波器皆具有極佳之濾波特性。另一方面，縮小型雙波段雙波段帶通濾波器比傳統型雙波段帶通濾波器，可以縮小大約35%之電路尺寸。而進階型雙波段帶通濾波器，除了於截止區具有三個傳輸零點外，並且比傳統型雙波段帶通濾波器可以縮小大約52%之電路尺寸。

The design of the dual-band bandpass filter using the folded stepped-impedance resonators have several advantages, such as the adjustable spurious frequency and the compact size. In this thesis, the U-shaped stepped-impedance resonators are used to design the dual-band bandpass filters.
In this thesis, the theory of the design of dual-band bandpass filter using U-shaped stepped-impedance resonators is analyzed firstly. Next, the conventional, compact and advanced dual-band bandpass filters using U-shaped resonators are designed, respectively. Finally, the compact and advanced dual-band bandpass filters are realized. In addition, the characteristics of the bandpass filters are measured.
From the analyzed results, it is found that both two bandpass filters have good performance. Furthermore, the size of the compact dual-band bandpass filter can be reduced about 35% as compared with the conventional one. And, the advanced dual-band bandpass filter not only has three transmission zeros in the stopband, but also can be reduced about 52% as compared with the conventional dual-band bandpass filter.

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U型步階阻抗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 傳統型雙波段帶通濾波器..........................6
2-4 縮小型雙波段帶通濾波器.........................10
2-4.1 諧振器之設計...............................11
2-4.2 諧振器間之耦合係數.........................12
2-5 進階型雙波段帶通濾波器.........................15
2-5.1 諧振器之設計...............................15
2-5.2 諧振器間之耦合係數.........................17
第三章 雙波段帶通濾波器之設計............................34
3-1 簡介...........................................34
3-2 傳統型雙波段帶通濾波器.........................34
3-3 縮小型雙波段帶通濾波器.........................38
3-3.1 縮小型電路之諧振器.........................39
3-3.2 各參數值之影響.............................41
3-3.3 電路設計...................................44
3-4 進階型雙波段帶通濾波器.........................48
3-4.1 進階型電路之諧振器.........................48
3-4.2 各參數值之影響.............................50
3-4.3 電路設計...................................53
3-5 模擬特性之比較.................................55

第四章 雙波段帶通濾波器之製作與特性量測..................82
4-1 簡介...........................................82
4-2 電路佈局與製作.................................82
4-3 縮小型雙波段帶通濾波器.........................82
4-4 進階型雙波段帶通濾波器.........................83
4-5 結果與討論.....................................84
第五章 結論..............................................94
參考文獻..................................................96

參 考 文 獻

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