A low loss NiZnCo ferrite, prepared using a hydrothermal method, for antenna applications

被引：25

作者：

Chen, Kang ^{[1
]}

Jia, Lijun ^{[1
]}

Yu, Xianghai ^{[1
]}

Zhang, Huaiwu ^{[1
]}

机构：

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

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 115卷 / 17期

关键词：

MOBILE-PHONE APPLICATIONS; T-DMB ANTENNA;

D O I：

10.1063/1.4866517

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this paper, a novel low-loss NiZnCo ferrite prepared by a hydrothermal method has been developed for miniaturization and performance enhancement of mobile handset antennae. XRD analysis revealed that in weakly alkaline solution, H+ ions generated in the reaction process result in an acid-alkali imbalance. In a strongly alkaline solution, Fe(OH)(3) readily loses water to generate alpha-Fe2O3 and is no longer able to act as a nucleation skeleton. With powders prepared at pH = 10, the ceramic samples consisted of a pure phase, with compact and uniform microstructure, leading to relatively high permeability, very low dielectric constant, and with low losses. A miniaturization factor of about 6.2 and normalized impedance of about 1 were obtained for the developed substrate ferrite when used in a helical antenna operating in the terrestrial digital multimedia broadcasting (T-DMB) band for a mobile handset. (C) 2014 AIP Publishing LLC.

引用

页数：3

共 11 条

[1] Nanosized powders of NiZn ferrite: Synthesis, structure, and magnetism [J].