臺灣博碩士論文加值系統

本論文提出了一種改良的雙微帶線量測法用於寬頻量測微帶線板材的介電常數。此方法使用兩組不同結構的步階阻抗微帶線散射參數(S-parameter)量測結果，將其分別轉換成散射傳輸參數(T-Parameter)後，推導介電常數的量測公式。由於步階阻抗傳輸線會在阻抗不同的傳輸線連接處會有不連續接面效應，因此研究中將不連續接面的等效電路轉換成散射傳輸矩陣，以求得介電常數的量測結果。實作上使用Rogers公司的RO4003C板材驗證此量測法，量測頻寬為0.1 GHz ~ 10 GHz，誤差在Data sheet給訂的介電常數±3.5%之內。此方法若使用更加精確的傳輸線不連續接面等效電路，可以更加改善介電常數的量測準確度。

In this paper, an improved method is proposed for the broadband measurement of the dielectric constant of the microstrip substraste with two-microstrip-line method. This method uses the S-parameters measurement results of two different structures of the stepped-impedance microstrip lines, and converts them into a scattering transfer parameters (T-Parameters) respectively. Then derives the measurement equation of the dielectric constant. Because the stepped-impedance transmission lines has a discontinuous junction effect at the connection of the transmission lines with different impedances, this method converts the equivalent circuit of the discontinuity step into a T-Parameters to obtain the measurement result of the dielectric constant.
In terms of implementation, this method is verified with RO4003C substrate, the measurement bandwidth is 0.1 GHz ~ 10 GHz, and error is within ±3.5% of the dielectric constant given by Data sheet. If a more precise equivalent circuit of discontinuity step is used, the accuracy of the dielectric constant measurement results can be improved.

摘要……………………………………………………………………………………Ⅰ
Abstract…………………………………………………………………………Ⅱ
誌謝……………………………………………………………………………………Ⅲ
目錄……………………………………………………………………………………Ⅳ
圖目錄………………………………………………………………………………Ⅵ
表目錄 ……………………………………………………………………………Ⅶ
第一章 緒論
1.1前言………………………………………………………………………………1
1.2研究動機與設計………………………………………………………2
1.3文獻探討 …………………………………………………………………3
1.4論文架構 …………………………………………………………………4
第二章 介電常數與傳輸線矩陣量測法
2.1介電常數與有效介電常數 ………………………………………………5
2.1.1 介電常數………………………………………………………7
2.1.2 有效介電常數……………………………………………………7
2.2傳輸線矩陣量測法………………………………………………………9
2.2.1 雙微帶線相位差量測法…………………………………………9
2.2.2 雙微帶線ABCD矩陣量測法…………………………………10
2.2.3 雙微帶線傳輸矩陣量測法……………………………………12
2.2.4 雙微帶線不連續傳輸線量測法………………………...………13
第三章 使用步階阻抗傳輸線之雙微帶線量測法
3.1使用步階阻抗傳輸線之雙微帶線矩陣原理 …………………………15
3.2散射傳輸參數(T參數) …………………………………………………18
3.3傳輸線不連續接面等效 …………………………………………………21
第四章 介電常數之量測與比較
4.1步階阻抗傳輸線長度之影響 ……………………………………………29
4.2步階阻抗傳輸線線寬變化之影響 ………………………………………36
4.3 RO4003C板材之模擬與量測結果 ……………………………………41
4.4 文獻比較…………………………………………………………………45
第五章 結論與展望
5.1結論 …………………………………………………………………47
5.2未來展望 …………………………………………………………………48
參考文獻 ……………………………………………………………………………49

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