臺灣博碩士論文加值系統

本文主要針對PCB (Printed Circuit Board)的電源層(Power Plane)與地層(Ground Plane)之佈局，研究並討論PCB的板邊電磁波輻射干擾(Electromagnetic Interference, EMI)。為探討PCB電源層與地層之不同設計，針對EMI方面作量測與模擬，並配合理論演算來証明實驗的可靠度。首先，由概估電源層內縮20H之遠場電場最大值來推論該理論之可行性，並利用以有限元素法為分析基礎之三維電磁波模擬軟體HFSS (High Frequency Structure Simulation)做模擬驗證，再經由3米的半無反射式電波暗室(Semi-Anechoic Chamber)作實際量測比對。經由電源層內縮20H的理論推算與量測結果，分析不同的電路設計方式對EMI之影響，以期能在維持各項設計條件不變之狀況下找出最佳之PCB設計。

This thesis is focusing on the printed circuit board (PCB) layout between the power plane and the ground plane regarding research and discussion of electromagnetic interference (EMI) in PCB. In order to investigate the effects upon EMI for the different design of the power plane and the ground plane of PCB, there are measurements and simulations in this thesis. There are also theoretical calculations to support the data of the experiments. Firstly, the width is 20 times of the height in the broad that is chosen to use in this study. The maximum of the far electric field is evaluated to support the possibility of the experiment. The simulation software, High Frequency Structure Simulator (HFSS), is utilized to simulate the edge emission of PCB and verify the measurement. Finite element method (FEM) is the analytic basis of HFSS. The measurements are made in the 3m semi-anechoic chamber and the results are compared with the simulations. The effects upon EMI for the different designs are analyzed by the results of the theoretical calculations and the measurement. A good PCB design is expected to be found, and every design condition is desired to be maintained in the proposed countermeasures.

第一章 緒論
1.1研究動機
1.2研究方法與目的
1.3研究大綱
第二章 理論分析
2.1 S 參數的量測原理
2.2空腔模型
2.3 20H rule理論
2.4 PCB輻射場的計算
2.5 本章結論
第三章 印刷電路板設計規範與原理
3.1 輻射性EMI的量測規範
3.2 印刷電路板(PCB)的設計簡介
3.2.1測試PCB板的傳輸線模態
3.2.2測試PCB板的微帶天線模態
3.3 實驗板之設計
3.4 本章結論
第四章 測試實驗系統的架設
4.1 網路分析儀
4.2 輻射性(Radiation) EMI的量測系統架構
4.2.1半電波無反射隔離室
4.2.2頻譜分析儀(Spectrum Analyzer)
4.2.3信號產生器(Signal Generator)
4.2.4天線與旋轉桌
4.3 HFSS模擬分析介紹
4.4 本章結論
第五章 測試與模擬分析
5.1 S 參數的量測與驗証
5.2 模擬軟體HFSS對S11的分析
5.3 半電波暗室的實際量測與HFSS模擬分析
5.3.1 na 方向的實際量測
5.3.2 ta方向的實際量測
5.3.3 tb方向的實際量測
5.3.4 tc方向的實際量測
5.4 改善PCB板邊輻射的設計
5.5 本章結論
第六章 結論與建議
6.1 本論文的貢獻
6.2 未來努力方向
參考文獻
附錄A 有限元素法(FEM)的理論
附錄B HFSS軟體的設定方法與模擬簡介

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