Ga-substituted Mg-Cd ceramic composites for improving the miniaturization and wideband characteristics of high-frequency antennas

被引：3

作者：

Gan, Gongwen ^{[1
]}

Zhang, Dainan ^{[1
]}

Li, Jie ^{[1
]}

Wang, Gang ^{[1
]}

Huang, Xin ^{[1
]}

Rao, Yiheng ^{[1
]}

Yang, Yan ^{[1
]}

Wang, Xueying ^{[1
]}

Zhang, Huaiwu ^{[1
]}

Chen, Ray T. ^{[2
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[2] Univ Texas Austin, Microelect Res Ctr, Dept Elect & Comp Engn, Austin, TX 78758 USA

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Ga substitution; Mg-Cd ceramic Composites; High frequency; Miniaturization; Wideband antennas; IRON-OXIDE NANOPARTICLES; DIELECTRIC-PROPERTIES; MAGNETIC-PROPERTIES; SINTERING TEMPERATURE; OPTICAL-PROPERTIES; EQUIVALENT PERMEABILITY; CATION DISTRIBUTION; FERRITE CERAMICS; PERMITTIVITY; MICROSTRUCTURE;

D O I：

10.1016/j.ceramint.2020.03.269

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mg0.8Cd0.2Fe1.9Ga0.1O4 ceramic ferrites were synthesized using a solid-state reaction method at 900, 915, 930 and 945 degrees C. Crystallization analysis indicated that the change in temperature resulted in obvious changes in the microstructure. SEM images indicated that the grain size increased from 0.8 to 1.8 mu m. Elevated saturation magnetization (Ms approximate to 26 emu/g) and reduced coercivity (Hc approximate to 53 Oe) indicated the excellent soft-magnetic behavior of the ceramics. The real part of the permeability correspondingly increased (29-51), and the real part of permittivity showed a slight fluctuation (20-25) with an increase in the temperature. Consequently, an upward bandwidth ratio (BWR approximate to 0.2, 915 degrees C) and matching characteristic impedance were obtained over a wide frequency range of 1-100 MHz. Additionally, with the low magnetic (tan delta(mu) similar to 10(-2)) and dielectric (tan delta(e) similar to 10(-4)-10(-3)) tangent values, the proposed materials can act as potential agents for enhancing the bandwidth and miniaturization of antennas operating at high frequencies.

引用

页码：16901 / 16907

页数：7

共 49 条

[1] Impact of Co doping on physical, structural, microstructural and magnetic features of MgZn nanoferrites for high frequency applications [J].