臺灣博碩士論文加值系統

在本論文中，我們對於多層印刷電路中不連續結構所造成的電磁效應主要可以三個部份探討：第一部份，首先介紹一種基於傳輸線理論為基礎的模擬方法，且透過規則、不規則以及多層板與連通柱結構……等一連串模擬測試結構,最後驗証與三維全波模擬法相比除了有良好的精準度，且能有效的縮減模擬時間。第二部份，則是以模擬方法為工具探討連通柱、狹縫不連續結構所造成效應，得知不連續結構會造成回流電流中斷，並在電源空腔共振頻率形成駐波，是產生瞬時切換雜訊、信號品質問題及電磁輻射效應的主因之一。最後一部份，則是介紹如何利用模擬方法對於模擬電磁輻射場且進行快速評估，並提供利用模擬方法並結合短路連通柱及狹縫結構的一種有效抑制雜訊或電磁輻射場的架構。

In this thesis, we study the discontinuity structure electromagnetic effect of multilayer printed circuit board in three sections. In first section, we introduced a modeling approach which is based on transmission line theory , and simulated with a series of test boards ,such as regular and irregular power delivery system and multilayer with via structure, finally ,we confirmed that the modeling approach is an efficient simulation and agreed fairly well with 3D full-wave method. In second section, we demonstrated the return current is disrupted at the via or broken at the power / ground plane with slots , the impedance becomes extremely high at the resonance frequencies of the power / ground plane cavity and via could be a major cause of the simultaneous switching noise generation, signal quality problem, and edge radiated emission in multi-layer PCB. In final section, we provided a effective reduction mechanism to eliminate the noise or EMI, which has been achieved using island with shorting vias and combining with the modeling approach can simulate and estimate effectively.

目錄……………………………………………………………………………IIII
圖表索引……………………………………………………………………………III
第一章 序論
1.1研究背景與目的..............................................................................................1
1.2文獻回顧..........................................................................................................2
1.3論文大網..........................................................................................................3
第二章 數值及模擬方法
2.1簡介..................................................................................................................4
2.2數值模擬方法概述..........................................................................................5
2.3平行板二維傳輸線模型..................................................................................7
2.3.1單位網格模型與參數.............................................................................7
2.4電源平面等效模型..........................................................................................8
2.4.1規則電源平面.........................................................................................8
2.4.2模擬與比較.............................................................................................9
2.4.3不規則電源平面...................................................................................11
2.4.4模擬與比較...........................................................................................12
2.5平衡式傳輸線模型........................................................................................15
2.5.1信號線模型參數...................................................................................16
2.5.2連通柱模型參數...................................................................................20
2.6四層板結合連通柱平衡式傳輸線模型........................................................21
2.6.1模擬與比較...........................................................................................22
2.7總結................................................................................................................26
第三章 不連續結構效應
3.1簡介................................................................................................................28
3.2瞬時切換雜訊效應........................................................................................29
3.2.1瞬時切換雜訊原因...............................................................................29
3.2.1模擬與比較...........................................................................................30
3.3信號傳輸線與電源平面耦合效應................................................................35
3.4信號品質問題................................................................................................36
3.4.1連通柱結構...........................................................................................36
3.4.2連通柱結構對電源平面阻抗影響.......................................................39
3.4.3狹縫結構...............................................................................................40
3.5總結................................................................................................................43
第四章 電磁輻射效應
4.1簡介................................................................................................................44
4.1.1計算電磁輻射場...................................................................................45
4.1.1模擬與比較...........................................................................................47
4.2改善電磁輻射效應........................................................................................49
4.2.1改善及抑制方法...................................................................................49
4.2.2狹縫電源島混合短路連通柱...............................................................50
4.2.3模擬與比較...........................................................................................51
第五章 結論
5.1結論................................................................................................................55
參考文獻......................................................................................................................56

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