陶瓷
材料科学
微波食品加热
介电常数
电介质
天线(收音机)
热稳定性
分析化学(期刊)
光电子学
相(物质)
矿物学
复合材料
电信
电气工程
化学工程
化学
计算机科学
有机化学
色谱法
工程类
作者
Congling Yin,Kang Du,Xiaoqiang Song,Ying Xiong,Jiaqing Yang,Mingfei Cheng,Yiyang Cai,Wei Luo,Huanhuan Guo,Wen‐Zhong Lu,Chunchun Li,Wen Lei
摘要
Abstract The dielectric properties of a Ga‐based melilite type ceramic Sr 2 Ga 2 SiO 7 via theoretical prediction based on far‐infrared spectroscopy and experimental measurement by the Hakki–Coleman method were studied in this work. Dense and single‐phase ceramics were fabricated via solid‐state reaction at 1330°C and exhibited comprehensive microwave dielectric properties ( ε r ∼ 7.6, Q × f ∼ 23 600 GHz, and τ f ∼ −35.2 ppm/°C) at 14.3 GHz. Chemical modifications were proposed to adjust the thermal stability and reduce the densification temperature. By adding 10 mol% CaTiO 3 , the negative τ f can be compensated to a near‐zero value of −3.8 ppm/°C. The densification temperature was reduced to 940°C by adding 3 wt.% LiF. A patch antenna was designed using Sr 2 Ga 2 SiO 7 ceramic with a high radiation efficiency of 99.1% and a gain of 2.788 dBi at the center frequency of 4.371 GHz. All results indicate that the Sr 2 Ga 2 SiO 7 ceramic has promising application potential for 5G wireless communication technology.
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