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Spinel-olivine microwave dielectric ceramics with low sintering temperature and high quality factor for 5 GHz wi-fi antennas
Applied Materials Today ( IF 7.2 ) Pub Date : 2020-09-20 , DOI: 10.1016/j.apmt.2020.100826
Huaicheng Xiang , Joni Kilpijärvi , Sami Myllymäki , Haitao Yang , Liang Fang , Heli Jantunen

The patch antenna of spinel-olivine composite ceramic (Li2ZnGe3O8-Li2ZnGeO4) is designed, which can realize power ratio (59%) and S11 of -14 dB at 5.7 GHz. The low sintering temperature (< 960 °C), low relative permittivity (8.15) and good microwave dielectric properties (quality factor ~ 32,500 GHz, resonant frequency temperature coefficient ~ -74.8 ppm/ °C) were obtained for spinel-olivine composite ceramic. Li2ZnGe3O8-Li2ZnGeO4 composite microwave dielectric ceramics were synthesized at 900–980 °C using Li2CO3, ZnO and GeO2, which can co-fire with silver electrodes without chemical reaction. These exceptional characteristics enable high-speed signal transmission application of spinel-olivine composite ceramics (Li2ZnGe3O8-Li2ZnGeO4) in 5 GHz Wi-Fi antennas.



中文翻译:

烧结温度低,品质因数高的尖晶石-橄榄石微波介电陶瓷,用于5 GHz Wi-Fi天线

设计了尖晶石-橄榄石复合陶瓷贴片天线(Li 2 ZnGe 3 O 8 -Li 2 ZnGeO 4),在5.7 GHz时可实现功率比(59%)和-14 dB的S 11。尖晶石-橄榄石复合陶瓷的烧结温度低(<960°C),相对介电常数(8.15)和良好的微波介电性能(品质因数〜32,500 GHz,共振频率温度系数〜-74.8 ppm /°C)。在900–980°C下使用Li 2 CO 3合成了Li 2 ZnGe 3 O 8 -Li 2 ZnGeO 4复合微波介电陶瓷。,ZnO和GeO 2,它们可以与银电极共烧而不发生化学反应。这些优异的特性使尖晶石-橄榄石复合陶瓷(Li 2 ZnGe 3 O 8 -Li 2 ZnGeO 4)在5 GHz Wi-Fi天线中实现高速信号传输。

更新日期:2020-09-20
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