Spinel-olivine microwave dielectric ceramics with low sintering temperature and high quality factor for 5 GHz wi-fi antennas
Xiang, Huaicheng; Kilpijärvi, Joni; Myllymäki, Sami; Yang, Haitao; Fang, Liang; Jantunen, Heli (2020-09-20)
Huaicheng Xiang, Joni Kilpijärvi, Sami Myllymäki, Haitao Yang, Liang Fang, Heli Jantunen, Spinel-olivine microwave dielectric ceramics with low sintering temperature and high quality factor for 5 GHz wi-fi antennas, Applied Materials Today, Volume 21, 2020, 100826, ISSN 2352-9407, https://doi.org/10.1016/j.apmt.2020.100826
© 2020 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe2020112793436
Tiivistelmä
Abstract
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.
Kokoelmat
- Avoin saatavuus [31941]