在本論文中將討論xMgTiO3-(1-x)Ca0.6Nd0.8/3TiO3、-(1-x)Ca0.6La0.8/3TiO3及-(1-x)MgTa2O6系統之微波特性，經實驗結果發現，適當調整x值，可使其頻率漂移係數趨近於零。
此外，本論文還以FR4、氧化鋁及0.5MgTiO3-0.5MgTa2O6作為基板來設計一耦合線型式的帶通濾波器，濾波器的規格為:中心頻率 2.375GHz、頻寬 5%。

The systems of microwave dielectric properties of xMgTiO3-(1-x)Ca0.6Nd0.8/3TiO3、-(1-x)Ca0.6La0.8/3TiO3 and –(1-x)MgTa2O6 have been discussed in this paper .The results show that appropriately adjusting the x value ,zero τf value can be obtained .
Besides ,a coupled line band-pass filter on FR4、Al2O3 and 0.5MgTiO3-0.5MgTa2O6 substrates have been design.The
band-pass frequency is 2.375GHz,the bandwidth is 5%.

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