本篇論文將會分為二大部分介紹，第一部分為兩種新型低溫共燒陶瓷材料及其微波介電性能；第二部分使用FR4及 Ca0.95Sr0.05Nd2(MoO4)4兩種不同基板製作兩種不同饋電結構之單一微帶貼片天線，並分析模擬與實作之結果。
首先第一部分之第一種材料，SrNb2V2O11陶瓷之微波介電特性，在燒結溫度820°C下持溫4小時，可得最佳微波介電特性εr≈74.5、Q×f≈13,000 GHz和τf≈517 ppm/°C，顯示此特性具有應用於LTCC材料溫度補償劑之潛力；Ca(1−x)SrxNd2(MoO4)4 (x=0–0.09)陶瓷在燒結溫度850°C下，透過 Sr2+微量取代Ca2+(x=0.05)，可得到最佳微波介電特性εr≈11.97、Q×f≈105,000 GHz和τf≈-50.9 ppm/°C，實驗分析結果證實了微量取代能有效提升微波介電特性，並透過P-V-L鍵結理論獲得進一步的驗證。除了外部因子之相對密度與微觀結構外，晶格填充率、鍵離子度、晶格能和鍵能等內部因子也作為控制微波頻率下陶瓷介電特性的關鍵因素之一。透過燒結製程調控，材料能在最佳條件下展現突出性能，有利於後續在 5G/6G 高頻元件中的應用。
本研究第二部分利用HFSS軟體設計並模擬與實作適用於Ku-band地對空衛星應用頻段(12.75-13.25 GHz)的單一微帶貼片天線，對比分析兩種不同饋電結構：邊緣式饋電與嵌入式饋電。模擬設計分別實作於FR4基板與本研究所得最佳低損耗材料Ca0.95Sr0.05Nd2(MoO4)4基板。結果顯示，Ca0.95Sr0.05Nd2(MoO4)4基板因具有較高的相對介電係數，不僅能有效縮小天線尺寸，其天線性能亦全面優於FR4基板設計。此外，邊緣式饋電結構較嵌入式饋電結構更容易實現阻抗匹配，具備結構設計上的優勢。採用低介電損耗且高相對介電係數的Ca0.95Sr0.05Nd2(MoO4)4基板結合邊緣式饋電結構的天線展現最佳性能，模擬與量測結果趨勢相符：中心頻率達13.17 GHz時，S11為−28.46 dB，頻寬達1.25 GHz，增益為6.13 dBi。此結果表示，利用此基板設計的天線，不僅可微縮體積，還能顯著提升頻率響應與增益，具備作為陣列天線應用於地對空衛星通訊的良好潛力。

This thesis comprises two main parts. The first part focuses on two novel low-temperature co-fired ceramic (LTCC) materials and their microwave dielectric properties. The second part involves the design, fabrication, and analysis of single microstrip patch antennas with two different feed structures on conventional FR4 and optimized low-loss Ca0.95Sr0.05Nd2(MoO4)4 substrates. Both simulation and experimental results are comprehensively evaluated.
The microwave dielectric properties of SrNb2V2O11 ceramics sintered at 820 °C for 4 hours showed optimal characteristics with relative permittivity (εr) ≈ 74.5, quality factor-frequency (Q×f) ≈ 13,000 GHz, and temperature coefficient (τf) ≈ 517 ppm/°C, indicating strong potential as LTCC temperature compensators. Ca(1−x)SrxNd2(MoO4)4 (x = 0–0.09) ceramics sintered at 850 °C showed significantly improved properties with minimal Sr2+ substitution at x = 0.05: εr ≈ 11.97, Q×f ≈ 105,000 GHz, and τf ≈ –50.9 ppm/°C. Trace substitution effectively enhances dielectric properties, confirmed by P–V–L bond theory analysis. Besides extrinsic factors like density and microstructure, intrinsic parameters such as lattice packing density, bond ionicity, lattice energy, and bond energy critically govern microwave dielectric behavior. Optimized sintering enables superior performance suitable for emerging 5G/6G applications.
The second part employs HFSS to design, simulate, and fabricate single microstrip patch antennas operating in the Ku-band ground-to-satellite frequency range (12.75–13.25 GHz), comparing edge-fed and inset-fed structures. Antennas fabricated on Ca0.95Sr0.05Nd2(MoO4)4 substrates exhibit superior performance and substantial size reduction compared to FR4. The edge-fed structure offers better impedance matching than the inset feed, presenting structural advantages. The optimized antenna on Ca0.95Sr0.05Nd2(MoO4)4 with edge-fed structure achieved a center frequency of 13.17 GHz, an S11 parameter of –28.46 dB, bandwidth of 1.25 GHz, and gain of 6.13 dBi. This design demonstrates excellent potential for satellite communication array antenna applications.

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