臺灣博碩士論文加值系統

本文主要研究不同週期形狀結構對微帶線(Microstrip Line)串擾(Crosstalk)的影響並通過適當選擇微帶線週期形狀結構來減少串擾。這是一種亞波長(Subwavelenth)週期結構的微帶線，在金屬上引入光蝕刻(PhotoLithography)技術，使電磁場在金屬與介質的界面上互相影響，產生一種能在低頻傳播的人工表面電漿波(Spoof Surface Plasma Wave, SSPW)。這種人造金屬結構能使電磁場高度的束縛在微帶線周圍，因此可以有效的降低微帶線串擾。我們使用模擬軟體計算亞波長週期結構的色散，證實這類型的亞波長週期結構符合等效的表面電漿(Surface Plasma)性質。並且透過實驗結果發現，當兩條傳輸線距離等於微帶線寬的時後，量測頻率範圍在0.2 GHz～8 GHz，遠端串擾(Far-end crosstalk)的S參數(S-Parameter)較低於傳統微帶線，所以它非常適合用於高密度的微波電路或是高速電路的系統。在論文的最後，考慮不同週期形狀的微帶線，將遠端串擾與傳輸的S參數作一比較。

The subject of the present thesis is to reduce the crosstalk of microstrip lines by choosing the proper geometry of the subwavelength periodic structures. Such a kind of subwavelength periodically structured microstrip lines that is fabricated by photolithography on metals can lead to unusual interaction of EM fields on the interface between metal and dielectric, and hence a propagating low-frequency SSPW (Spoof Surface Plasma Waves) can be generated (excited). As such artificial metallic structures can make the EM fields highly localized in the microstrip lines, the crosstalk between microstrip lines can be dramatically reduced. We address the dispersion of the subwavelength periodic structures by numerical simulation, and demonstrate that the present structures can exhibit the property of the effective surface plasma. The experimental results show that the S-parameters in the frequency range 0.2 GHz～8 GHz are much lower than those in conventional microstrip lines when the distance between two transmission lines is equal to the microstrip line width. This, therefore, means that such subwavelength periodically structured microstrip lines could be utilized to design new electronic devices, which can have potential applications in high density microwave circuits and high speed circuit systems. In addition, the microstrip lines with various geometry (periodic structures and shapes), among which the far-end crosstalk and
S-parameters are compared, are also taken into account.

中文摘要 I
英文摘要 II
致謝 III
目錄 IV
表目錄 VI
圖目錄 VII
第一章 緒論 1
1.1 引言 1
1.2 金屬與介質界面的表面電漿波 1
1.3 人工表面電漿與亞波長結構的研究 3
1.4 色散與衰減常數的模擬 4
1.4.1 色散的模擬方法 4
1.4.2 衰減常數的模擬方法 5
1.5 微帶線模型與S參數 5
1.6 研究動機與方向 6
第二章 亞波長週期結構(A)模擬與實驗 7
2.1 亞波長週期結構(A)參數 7
2.2 亞波長週期結構(A)的色散與衰減常數 7
2.3 亞波長週期結構(A)的S參數模擬 13
2.4 亞波長週期結構(A)的S參數實驗 19
第三章 亞波長週期結構(B)模擬與實驗 24
3.1 亞波長週期結構(B)參數 24
3.2 亞波長週期結構(B的色散與衰減常數 24
3.3 亞波長週期結構(B)的S參數模擬 25
3.4 亞波長週期結構(B)的S參數實驗 29
第四章 亞波長週期結構(C)模擬與實驗 33
4.1 亞波長週期結構(C)參數 33
4.2 亞波長週期結構(C)色散與衰減常數 33
4.3 亞波長週期結構(C)S參數模擬 35
4.4 亞波長週期結構(C)S參數實驗 39
4.5 不同形狀週期微帶線的S參數比較 43
第五章 結論與未來展望 44
參考文獻 45
碩士期間發表的論文 47

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