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研究生:張現源
研究生(外文):Hsien-yuan Chang
論文名稱:Ca(Mg1/3Nb2/3)O3陶瓷微波特性之改善及應用
論文名稱(外文):Improvement and Applications of Ca(Mg1/3Nb2/3)O3 Ceramics at Microwave Frequency
指導教授:施權峰施權峰引用關係黃正亮
指導教授(外文):Chuan-Feng ShihCheng-Liang Huang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:電機工程學系碩博士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:中文
論文頁數:76
中文關鍵詞:介電常數品質因數陶瓷微波
外文關鍵詞:ceramicmicrowavedielectricCa(Mg1/3Nb2/3)O3
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在本篇論文中將探討Ca(Mg1/3Nb2/3)O3陶瓷材料系統的微波介電特性及材料的微結構 , 藉由正負頻率溫度係數的互補,使其達到平衡。
Ca(Mg1/3Nb2/3)O3 具有負的共振頻率溫度係數 , 我們選擇添加Ca0.8Sm0.4/3TiO3 及(Ca0.61Nd0.26)TiO3來調整其τƒ。添加Ca0.8Sm0.4/3TiO3的材料以0.8Ca(Mg1/3Nb2/3)O3 – 0.2Ca0.8Sm0.4/3TiO3的介電特性較好εr~34,Q׃~35000GHz,τƒ~-3 ppm/oC,燒結溫度為1425℃。添加(Ca0.61Nd0.26)TiO3以0.6Ca(Mg1/3Nb2/3)O3–0.4(Ca0.61Nd0.26)TiO3的介電特性較好εr~47,Q׃~37000GHz,τƒ~6 ppm/oC , 燒結溫度為1375℃。
此外本論文還以FR4、Al2O3 及0.8Ca(Mg1/3Nb2/3)O3 -0.2Ca0.8Sm0.4/3TiO3作為基板來設計一微帶線帶通濾波器,濾波器的規格為:中心頻率 2GHz,並使用電磁模擬軟體IE3D來進行電腦模擬。
The microwave dielectric properties and the material microstructures of the Ca(Mg1/3Nb2/3)O3 ceramic system were investigated in this paper. By compensating for positive and negative temperature coefficient one. We achieved the balance.
Ca(Mg1/3Nb2/3)O3 with negative τƒ values. we added Ca0.8Sm0.4/3TiO3 and (Ca0.61Nd0.26)TiO3 to adjust τf value . The outcome reveals that the 0.8Ca(Mg1/3Nb2/3)O3 – 0.2Ca0.8Sm0.4/3TiO3 can be sintered at 1425oC and has the characteristics of εr ~ 34、 Q×f ~ 35000(GHz)、and τf value ~ -3ppm/oC.
0.6Ca(Mg1/3Nb2/3)O3 – 0.4(Ca0.61Nd0.26)TiO3 has the characteristics of εr ~ 47、Q׃ ~ 37000(GHz)、τƒ ~ 6ppm/oC can be sintered at 1375℃.
Finally, we design and fabricate band-pass filters with 2GHz center frequency on FR4、Al2O3、0.8 Ca(Mg1/3Nb2/3)O3 - 0.2Ca0.8Sm0.4/3TiO3 substrates respectively. And we compared with the results of the simulation and measurement.
目錄
摘要 I
Abstract II
誌謝 III
目錄 IV
表目錄 VII
圖目錄 VIII
第一章 緒論 1
1-1前言 1
1-2 研究目的 1
第二章 介電材料原理 2
2-1介電材料的微波電性分析 2
2-2介電共振器(Dielectric Resonator, DR) 6
2-3 鈣鈦礦之結構 9
2-4 燒結理論 10
2-4-1 液相燒結理論 10
第三章 微帶線及濾波器之原理 12
3-1 濾波器的簡介 12
3-2 微帶線原理 15
3-2-1 微帶線的損失 15
3-2-2 微帶線的不連續效應: 16
3-2-3 微帶線傳輸組態 18
3-2-4 微帶線各項參數公式 19
3-3 共振器耦合型態 22
3-3-1 電場耦合 22
3-3-2 磁場耦合 25
3-3-3 混合耦合 28
3-4 饋入結構分析[18] 30
3-4-1 非對稱性饋入 30
3-4-2對稱性饋入 33
第四章 實驗程序與量測方法 35
4-1 材料的製備 35
4-1-1 xCa(Mg1/3Nb2/3)O3 -(1-x) Ca0.8Sm0.4/3TiO3 35
4-1-2 xCa(Mg1/3Nb2/3)O3 -(1-x)(Ca0.61Nd0.26)TiO3 35
4-2 微波介電材料的特性分析與量測 37
4-2-1 X-Ray(XRD)分析 37
4-2-2 掃瞄式電子顯微鏡(SEM)分析 37
4-2-3密度之量測 37
4-2-4 微波介電特性的量測 38
4-3 濾波器元件之製作與量測 39
4-3-1 濾波器設計 39
4-3-2 濾波器實作 40
4-3-3 濾波器量測 41
第五章 實驗結果與討論 42
5-1 xCa(Mg1/3Nb2/3)O3 -(1-x)Ca0.8Sm0.4/3TiO3之微波特性探討 42
5-2 xCa(Mg1/3Nb2/3)O3 - (1-x)(Ca0.61Nd0.26)TiO3之微波特性探討 44
5-3 濾波器的響應 46
5-3-1 FR4基板 46
5-3-2 Al2O3基板 47
5-3-3 0.8Ca(Mg1/3Nb2/3)O3 -0.2Ca0.8Sm0.4/3TiO3基板 48
第六章 結論 73
參考文獻 74
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