Decoupling of antennas with wire metasurface structures: MRI applications

被引:0
|
作者
Hurshkainen, Anna A. [1 ]
Glybovski, Stanislav B. [1 ]
Melchakova, Irina V. [1 ]
Voogt, Ingmar J. [2 ]
van den Berg, Cornelis A. T. [2 ]
Raaijmakers, Alexander J. E. [2 ]
机构
[1] ITMO Univ, Dept Nanophoton & Metamat, St Petersburg, Russia
[2] Univ Med Ctr Utrecht, Utrecht, Netherlands
来源
PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON DAYS ON DIFFRACTION 2016 (DD) | 2016年
基金
俄罗斯科学基金会;
关键词
PHASED-ARRAY; 7; T; ELEMENT; DESIGN;
D O I
暂无
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
Metasurfaces are artificial two-dimensional structures with subwavelength periodicity. A shape and a size of the unit cells are responsible for electromagnetic properties of a metasurface. Metasurfaces provide specific boundary conditions which define the reflection and transmission properties with respect to incident plane waves. In the present work, we consider the structure based on the so-called mushroom-type metasurface having a high surface impedance in a certain frequency range. Such structures were previously employed in the microwave range to decouple closely spaced dipole antennas. Recently it was experimentally shown by the authors that such structures are also applicable to reduce mutual coupling between dipole elements of a body array coil for 7 Tesla MRI (operational frequency equal to 298 MHz). In this work, we extend our study in order to illustrate the effect of a mushroom structure on a radiofrequency field distribution inside an MR-scanner.
引用
收藏
页码:193 / 197
页数:5
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