本論文提出一套合成具有多個傳輸零點之帶通濾波器的解析方法，藉由預先決定兩個反射零點、兩個匹配品質因子與兩個傳輸零點等六個參數，就能準確合成出二階耦合諧振器帶通濾波器的原型，而此濾波器除了在通帶兩側各出現一個預設之傳輸零點外，還能再禁帶產生一個額外的傳輸零點。在論文中，詳細分析了此帶通濾波器的原型及合成元件值的方式，並且在最後利用LTCC技術實現出採用此合成方法之3.5 GHz WiMAX微小型帶通濾波器。

This thesis proposes an analytical method to synthesize bandpass filter with multiple transmission zeros. By using the six pre-determined parameters including two reflection zeros, two matching quality factors, and two transmission zeros, the method can exactly synthesize the corresponding prototype of second-order coupled-resonator bandpass filter. The synthesized filters not only can provide two pre-determined transmission zeros in the lower and upper side of the passband, but also can generate an extra transmission zero in the stopband. This thesis presents the prototypes of the bandpass filter and the methods of synthesis in detail. Finally this thesis implements compact LTCC bandpass filters by using the proposed synthesis method for 3.5 GHz WiMAX applications.

第一章 緒論 1
1.1 背景簡介1
1.2 研究動機2
1.3 WiMAX系統之簡介2
1.4 章節介紹3
第二章 二階耦合諧振器之帶通濾波器5
2.1 諧振器與品質因子5
2.2 二階耦合諧振器之帶通濾波器原型介紹10
第三章 濾波器傳輸零點之分析與合成14
3.1 產生傳輸零點方法之討論14
3.2 具有三個傳輸零點之帶通濾波器分析15
3.2.1 利用微波網路分析濾波器之傳輸零點15
3.2.2 傳輸零點位置之探討21
3.3具有三個傳輸零點之帶通濾波器合成24
3.3.1 電路架構之元件合成方法24
3.3.2 額外傳輸零點位置之分析40
第四章 LTCC帶通濾波器之設計與實現42
4.1 LTCC元件實現方法42
4.2 濾波器規格設定與元件合成43
4.3 元件佈局與電磁模擬46
4.4 量測方法與實作結果50
第五章 結論 61
參考文獻62

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