Superdirectivity by virtue of coupling between meta-atoms

Author

Shamonina, Ekaterina ; Solymar, Laszlo

Author_Institution

Electr. & Electron. Eng. (EEE) Dept., Imperial Coll. London, London, UK

fYear

2013

fDate

16-21 Sept. 2013

Firstpage

97

Lastpage

99

Abstract

We explore the possibility of achieving superdirectivity in metamaterials by relying on magnetoinductive waves, short-wavelength slow waves capable of providing rapidly varying current distribution. Using a dimer of magnetically coupled split rings we identify conditions for achieving superdirectivity in terms of the dimer size, the coupling strength and the quality factor. Predictions of the analytical model are verified numerically. Our results might lead to the first realization of genuine superdirective antenna arrays.

Keywords

Q-factor; electromagnetic metamaterials; slow wave structures; coupling strength; current distribution; dimer size; magnetically coupled split rings; magnetoinductive waves; meta-atoms; metamaterials; quality factor; short-wavelength slow waves; superdirective antenna arrays; superdirectivity; Couplings; Current distribution; Electromagnetics; Magnetic materials; Magnetic resonance imaging; Metamaterials; Q-factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2013 7th International Congress on

Conference_Location

Talence

Print_ISBN

978-1-4799-1229-2

Type

conf

DOI

10.1109/MetaMaterials.2013.6808965

Filename

6808965