在本論文中將討論Mg0.95Ni0.05TiO3陶瓷材料的微波介電特性及材料的微結構。由實驗結果知Mg0.95Ni0.05TiO3在1350℃燒結四小時，可得到介電特性εr~17.2，Q×f~180,000 ( 9GHz )，τf ~-45 (ppm/℃)。為了使共振頻率之溫度係數(τf)趨近於零，因此藉由正與負的共振頻率之溫度係數的介電材料來達到平衡。其中，具負共振頻率之溫度係數的Mg0.95Ni0.05TiO3分別與Ca0.6La0.8/3TiO3 (εr ~109，Q×f~17,000，τf ~ +212 (ppm/℃))、La0.5Na0.5TiO3 (εr ~122，Q×f~9600，τf ~ +480 (ppm/℃))及Nd0.5Na0.5TiO3(εr ~98，Q×f~7200，τf ~ +260 (ppm/℃))三個正共振頻率之溫度係數的介電材料混相。
由實驗結果顯示，(1-x)Mg0.95Ni0.05TiO3-xCa0.6La0.8/3TiO3系統在x =0.15燒結溫度1325℃得到良好的介電特性; εr~24.61，Q×f~102,000，τf ~ -3.6 (ppm/℃); (1-x)Mg0.95Ni0.05TiO3-xLa0.5Na0.5TiO3系統在x =0.13燒結溫度1275℃得到介電特性; εr~23.22，Q×f~86,000，τf ~ +2.8 (ppm/℃); (1-x)Mg0.95Ni0.05TiO3-xNd0.5Na0.5TiO3系統在x =0.19燒結溫度1300℃的介電特性; εr ~25.61，Q×f~69,000，τf ~ -8 (ppm/℃)。
最後，以FR4、Al2O3以及自製陶瓷基板0.87MNT-0.13LNT，設計一個3階Butterworth 髮夾式帶通濾波器，中心頻率為2.4GHz，頻寬10%，並使用電磁全波模擬軟體IE3D，討論模擬與實作量測的差異。

The microwave dielectric properties and microstructure of Mg0.95Ni0.05TiO3 ceramic materials are investigated in this study. The Mg0.95Ni0.05TiO3 ceramic possesses an dielectric constant (εr ) of 17.2，a Q×f value of 180,000 ( GHz )，a temperature coefficient of resonant frequency(τf) of -45 (ppm/℃) sintering at 1350℃ for 4 hrs. In order to obtain a temperature-stable material, a method of combining a positive temperature coefficient of resonant frequency material with a negative one was examined in the present study. Mg0.95Ni0.05TiO3 mixed with Ca0.6La0.8/3TiO3 [εr ~109，Q×f~17,000，τf ~ +212 (ppm/℃)]、La0.5Na0.5TiO3 [εr~122，Q×f~9600，τf ~ +480 (ppm/℃)] and Nd0.5Na0.5TiO3[εr~98，Q×f~7200，τf ~ +260 (ppm/℃)], respectively.
The experimental results show that when x=0.15, (1-x)Mg0.95Ni0.05TiO3-xCa0.6La0.8/3TiO3 system obtain the dielectric properties: εr ~24.61，Q×f~102,000，τf ~ -3.6 (ppm/℃); when x=0.13, (1-x)Mg0.95Ni0.05TiO3-xLa0.5Na0.5TiO3 system obtain the dielectric properties: εr~23.22，Q×f~86,000，τf ~ +2.8 (ppm/℃); when x=0.19, (1-x)Mg0.95Ni0.05TiO3-xLa0.5Na0.5TiO3 system obtain the dielectric properties: εr ~25.61，Q×f~69,000，τf ~ -8 (ppm/℃).
Finally, we design a three order Butterworth band-pass filter with hairpin shape on various substrates (such as FR4, Al2O3, and 0.87MNT-0.13LNT). The center frequency is 2.4GHz, FBW is 10%, and using full wave E.M. simulatior IE3D to discuss the difference between simulation and measurement.

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