本篇論文將會分為二大部分作介紹，第一部分為新型超低溫共燒陶瓷材料之微波介電性能；第二部分則是使用 FR4、Al2O3及 K1.86Ag0.14Co2(MoO4)3三種不同基板製作貼片天線，並分析模擬與實作之結果。
首先第一部分為K2Co2(MoO4)3陶瓷之微波介電特性，純相的K2Co2(MoO4)3在燒結溫度630oC下持溫4小時，可得最佳微波介電特性r ~ 7.31、Qf ~ 42,300 GHz、f ~ -81.3 ppm/oC；具有微量替代的K2Co1.9Zn0.1(MoO4)3樣品在630°C下實現了Q×f = 57,300 GHz，εr = 7.82和f = –69 ppm/°C，而K1.86Ag0.14Co2(MoO4)3樣品在540°C下表現出Q×f ~ 61,200 GHz，r ~ 8.73和f ~ –68 ppm/°C。研究還表明，該材料在共燒過程中與鋁電極具優異的化學相容性。基於這些結果，這些陶瓷材料在極低溫共燒陶瓷（ULTCC）應用中具有潛力，例如用於毫米波領域的天線及濾波器等。
第二部分利用HFSS設計一款應用於毫米波段頻帶介於(26.5 ~ 28.5)GHz的基板型貼片天線，並將模擬電路實作於FR4、Al2O3及K1.86Ag0.14Co2(MoO4)3三種基板上，結果顯示具低介電損耗的陶瓷材料能提升天線之表現。

Novel K2Co2(MoO4)3 microwave dielectric materials were prepared and investigated for the first time. The effects of substituting Ag+ for K+ and Zn2+ for Co2+ on the microwave dielectric properties, ceramic structure, sintering temperature, and surface microstructure were studied. The X-ray diffraction results showed that the samples had a monoclinic crystal structure and belonged to the P121/c1 (14) space group, with a single-phase composition of K2Co2(MoO4)3. The pure phase K2Co2(MoO4)3 ceramic achieved a Q×f = 42,300 GHz, an εr = 7.31, and a τf = –81.3 ppm/°C at a sintering temperature of 630°C. Partial substitution in the specimen can effectively enhance its densification and reduce the dielectric loss, primarily due to the reduction in cell volume of the ceramics. The K2Co1.9Zn0.1(MoO4)3 specimen with minute substitution achieved Q×f = 57,300 GHz, εr = 7.82 and τf = –69 ppm/°C at 630°C, while the K1.86Ag0.14Co2(MoO4)3 specimen showed Q×f = 61,200 GHz, εr = 8.73 and τf = –68 ppm/°C at 540°C. The research also exhibited that the material had outstanding chemical compatibility with aluminum electrodes during co-firing. Based on the results, these ceramics show potential as attractive candidates for ULTCC applications, such as a single antenna used in the millimeter-wave region, due to their low loss characteristics.

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