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| 研究生： |
陳冠中 Chung_Kuan - Chen |
|---|---|
| 論文名稱： |
單層佈線之週期性共模濾波器 Periodical common-mode filter of single layer layout |
| 指導教授： |
王蒼容
Chun-Long Wang |
| 口試委員: |
徐敬文
Ching-Wen Hsue 楊成發 Chang-Fa Yang 林坤佑 Kun-You Lin |
| 學位類別： |
碩士 Master |
| 系所名稱： |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
| 論文出版年： | 2015 |
| 畢業學年度： | 103 |
| 語文別： | 中文 |
| 論文頁數： | 200 |
| 中文關鍵詞： | 差動傳輸線 、共模濾波器 、單層佈線 、週期性 、90度彎角 、模轉換 |
| 外文關鍵詞： | differential transmission line, common-mode filter, single layer layout, periodical, right angle, mode conversion |
| 相關次數： | 點閱：218 下載：3 |
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摘要
本論文使用週期性阻抗變化的概念，來實現濾波器，內容包含了單條傳輸線濾波器、差動傳輸線共模濾波器、九十度彎角差動傳輸線共模濾波器，其改良結果分述如下。
首先，我們使用週期性阻抗變化的概念，來實現週期性阻抗變化的單線濾波器，隨著週期的增加，這個濾波器的濾波效果會越來越好。在設計個過程中，我們使用布拉格散射與小反射理論來預估這個濾波器的中心頻率，幫助我們可以快速地決定濾波器的中心頻率。
接著，我們將週期性阻抗變化的單線濾波器，應用到差動傳輸線上，完成週期性阻抗變化的共模濾波器。在設計的過程中，我們僅讓共模阻抗一直變化，使得共模雜訊產生大量的反射，反之我們匹配差模阻抗，讓差模訊號不反射而保有良好的穿透。與文獻中的共模濾波器比較，這個設計僅需要單層佈線，並且不用額外使用其他元件，因此可以降低層與層之間的干擾以及訊號的反射。
最後，我們將設計完成的週期性阻抗變化共模濾波器，應用到九十度彎角差動傳輸線，藉以降低九十度彎角差動傳輸線的模轉換。與強耦合差動傳輸線比較，使用週期性阻抗變化的差動傳輸線，除了可以維持強耦合差動傳輸線良好的特性之外，在共模濾波器的頻帶之內，有優於強耦合差動傳輸線的濾波效果。
Abstract
In this thesis, the idea of the periodical impedance variation is used to realize various band-rejection filters, including the band-rejection filter implemented with the single line, common-mode filter implemented with the differential transmission line, and common-mode filter implemented with the right-angled differential transmission line. The details are stated below.
First of all, The idea of the periodical impedance variation is used to realize the band-rejection filter on the single line. The the rejection efficiency of the band-rejection filter is enhanced with the increase of the period number. In order to determine the center frequency of the band-rejection filter, theories of Bragg scattering and small reflection are applied.
Consecutively, the band-rejection filter implemented with the single line is extended to the periodical common-mode filter implemented with the differential transmission line. In the design, the common-mode impedance is periodically varied so that the common-mode noise will be rejected. However, the differential-mode impedance is matched so that the differential-mode signal will be passed through. As compared with the common-mode filters in the literatures, the layer-to-layer inteference and differential-mode reflection could be alleviated since no vias, defected grounds, and compensation structures are needed.
Finall, the periodical common-mode filter is used to eliminate the common-mode noise induced by the right-angled differential transmission line. As compared with the right-angled differential transmission line using the stronglly-coupled turns, the performance of the periodical common-mode filter is superior than that of the right-angled differential transmission line using the stronglly-coupled turns over the specified band of the common-mode filter.
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