超高正溫度係數微波介電陶瓷之研究及其應用

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Title:	超高正溫度係數微波介電陶瓷之研究及其應用
Other Titles:	The Study of Microwave Dielectric Ceramics with Ultra High-Positive Temperature Coefficient and Applications
Authors:	陳智偉 CHEN, CHIH-WEI
Contributors:	林士弘;沈俊旭 LIN, SHIH-HUNG;SHEN, JIUNN-SHIUN 電機工程學系
Keywords:	微波介電材料;濾波器;摻雜;正溫度係數 Microwave dielectric material;Filter;Doping;Positive temperature coefficient
Date:	2019
Issue Date:	2019-12-16T06:53:56Z (UTC)
Abstract:	隨著進入 5 G 新時代，人們對於行動裝置的依賴程度越來越高，其中微波電路的效能及電路尺寸縮小扮演十分重要的角色，設計高穩定度且微小化的微波元件就顯得十分關鍵。因此，介電陶瓷材料是目前製作微波元件基板較佳的選擇，其高介電係數可以使電子元件縮小、高品質因素可以提高儲存電磁波之能量以及趨近於零的共振頻率溫度飄移係數，則是可以使微波元件在不同溫度下，均得以穩定操作。本論文先探討第一組主相材料 Ca0.8Sr0.2TiO3 微波介電陶瓷在摻雜不同比例的 Mg 時的介電特性。從結果顯示，Mg0.8Sr0.2TiO3 在燒結溫度 1425 (ºC )持溫 4 (hr)的條件下有最好的介電特性，介電常數ε With the new era of 5 G, people were increasingly dependent on mobile devices. The performance and miniaturization of microwave circuits played an important role. Designing high-stability and miniaturized microwave components was very critical. Therefore, dielectric ceramic materials are currently the better choice for fabricating microwave component substrates. Size reduction of electronic components can be achieved with high dielectric constant, the high quality factor means better ability for storage of the electromagnetic waves energy, and near zero temperature coefficient of resonance frequency means that device could operate stably under wide range of temperature. In this paper, the dielectric properties of the first main phase material Ca0.8Sr0.2TiO3 microwave dielectric ceramics doped with different proportions of Mg are discussed. The results show that Mg0.8Sr0.2TiO3 has the best dielectric properties at a sintering temperature of 1425 (oC)for 4 hours. The dielectric constant ε
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