Microwave Dielectric Properties and ApplicationsOf (Mg0.95Zn0.05)TiO3 Ceramics

• Main Authors: Shi-Sheng Liu, 劉士生
• Other Authors: Cheng-Liang Huang
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/64299864176379497383

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 92 === 　　The microwave dielectric properties and the microstructures Of the series of (Mg0.95Zn0.05)TiO3 ceramics system were investigated. The microwave dielectrics properties are strongly correlated with the sintering temperature. At 1300oC for 4h,the (Mg0.95Zn0.05)TiO3 ceramics can give εr〜17.05,Qxf value〜264000GHZ(at11GHZ) and a �輎 value of〜-40.31ppm/oC. 　　By appropriately adjusting the CaTiO3 in the series of (Mg0.95Zn0.05)TiO3 ceramics system, approach zero f value can be achieved .The CuO additives lowered the sintering temperature Of 0.95(Mg0.95Zn0.05) TiO3-0.05CaTiO3 ceramics to the range 1175oC〜1250oC.A dielectric constant ofεr〜21.48,a Qxf value of 125600GHZ(at 9.6GHZ) and a �輎 value of〜-5.95 ppm/oC was obtained for 0.95(Mg0.95Zn0.05)TiO3-0.05CaTiO3+0.5wt% CuO ceramics sintered at 1225oC for 4h. 　　On another hand, we use three ceramic dielectric materials: FR4, Al2O3 and 0.95(Mg0.95Zn0.05)TiO3-0.05CaTiO3+0.5wt% CuO. to fabricate the substrate. In this thesis, the characteristics of a wide-band microstrip bandpass filter with the designed center frequency of 5.4 GHZ where reported. The filter used in this work was composed of the ring resonator. And we compared the result of the simulation with the result of the measurement of the performance.