Ultrahigh frequency tunability of aperture-coupled microstrip antenna via electric-field tunable BST

A composite ceramic with nominal composition of 45.0 wt%（Ba0.5Sr0.5）TiO3–55.0 wt%MgO（acronym is BST–MgO） is sintered for fabricating a frequency reconfigurable aperture-coupled microstrip antenna. The calcined BST–Mg O composite ceramic exhibits good microwave dielectric properties at X-band with ap...

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Bibliographic Details
Published in:Chinese physics B 2015-12, Vol.24 (12), p.568-571
Main Author: 杜洪磊 薛倩 高小洋 姚凤蕊 卢世阳 汪业龙 刘春恒 张永成 吕跃广 李山东
Format: Article
Language:English
Subjects:
Acronyms
BST
Ceramics
Dielectric constant
Dielectric loss
Microstrip antennas
Roasting
Ultrahigh frequencies
X-band
可调性
可重构天线
微带天线
调谐
高介电常数
高电场
高频率
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Summary:A composite ceramic with nominal composition of 45.0 wt%（Ba0.5Sr0.5）TiO3–55.0 wt%MgO（acronym is BST–MgO） is sintered for fabricating a frequency reconfigurable aperture-coupled microstrip antenna. The calcined BST–Mg O composite ceramic exhibits good microwave dielectric properties at X-band with appropriate dielectric constant εr around85, lower dielectric loss tan δ about 0.01, and higher permittivity tunability 14.8% at 8.33 k V/cm. An ultrahigh E-field tunability of working frequency up to 11.0%（i.e., from 9.1 GHz to 10.1 GHz with a large frequency shift of 1000 MHz）at a DC bias field from 0 to 8.33 k V/cm and a considerably large center gain over 7.5 d B are obtained in the designed frequency reconfigurable microstrip antenna. These results demonstrate that BST materials are promising for the frequency reconfigurable antenna.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/24/12/127704