Cold sintered CaTiO3-K2MoO4 microwave dielectric ceramics for integrated microstrip patch antennas

被引：84
作者：
Wang, Dawei [1 ]
Zhang, Shiyu [2 ]
Wang, Ge [1 ]
Vardaxoglou, Yiannis [2 ]
Whittow, Will [2 ]
Cadman, Darren [2 ]
Zhou, Di [3 ,4 ]
Song, Kaixin [1 ,5 ]
Reaney, Ian M. [1 ]
机构：
[1] Univ Sheffield, Dept Mat Sci & Engn, Sheffield S1 3JD, S Yorkshire, England
[2] Loughborough Univ, Wolfson Sch Mech Elect & Mfg Engn, Loughborough LE11 3TU, Leics, England
[3] Xi An Jiao Tong Univ, Minist Educ, Key Lab, Elect Mat Res Lab, Xian 710049, Shaanxi, Peoples R China
[4] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Shaanxi, Peoples R China
[5] Hangzhou Dianzi Univ, Coll Elect Informat, Hangzhou 310018, Peoples R China
来源：
APPLIED MATERIALS TODAY | 2020年 / 18卷
基金：
英国工程与自然科学研究理事会;
关键词：
Cold sintering; Microwave dielectric ceramics; Microstrip patch antenna; HIGH-QUALITY FACTOR; RAMAN-SCATTERING; CRYSTAL-STRUCTURE; TEMPERATURE; SPECTROSCOPY; COMPOSITES;
D O I：
10.1016/j.apmt.2019.100519
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CaTiO3-K2MoO4 (CTO-KMO) dielectric composites were successfully cold -sintered at 150 degrees C for 30 min with a uniaxial pressure of 200 MPa. X-ray diffraction, Raman spectroscopy, back-scattered SEM and energy dispersive x-ray mapping confirmed the coexistence of CTO and KM0 with no evidence of interdiffusion and parasitic phases either between the two ceramic end-members or with Ag internal electrodes. As KMO concentration increased, the temperature coefficient of resonant frequency (TCF) and relative pemittivity (epsilon(r)) decreased but the microwave quality factor (Qx f) increased. A near-zero TCF composition was obtained for CTO-0.92KM0 composites which exhibited 6, 8.5 and Q x f similar to 11,000 GHz. A microstrip patch antenna was designed and fabricated using cold sintered CT 0-0.92KM0 as a substrate (40x40x1.4 mm), which gave a sl 1 of -14.2 dB and a radiation efficiency of 62.0 % at 2.51 GHz. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：5
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