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Multiple resonances in arrays of spiral resonators designed for magnetic resonance imaging

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Massaoudi, S. [UCL] Huynen, Isabelle [UCL]

This article analyzes a planar metamaterial made of spiral resonators (SRs) printed on a thin dielectric layer, and operating around 123 MHz for medical applications. The design is based on an analytical model using equivalent circuits. This approach enables to explain the origin of multiple resonant frequencies in SR metamaterials. Theoretical predictions are successfully validated by measurements carried out in the frequency range [100-140 MHz]. These properties lead to verb, interesting applications, such as compact antennas with high directivity or medical magnetic resonance imaging at 123 MHz. In particular our simulations show that a metamaterial slab, formed by an array of spiral resonators is able to transport the magnetic image information across the slab without distortion. (C) 2008 Wiley Periodicals, Inc.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2008
Language Anglais
Journal information "Microwave & Optical Technology Letters" - Vol. 50, no. 7, p. 1945-1950 (2008)
Peer reviewed yes
Publisher John Wiley & Sons Inc (Hoboken)
issn 0895-2477
e-issn 1098-2760
Publication status Publié
Affiliation UCL
Keywords metamaterial ; magnetic resonance imaging ; equivalent circuit ; rnicrostrip lines ; RF
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Bibliographic reference Massaoudi, S. ; Huynen, Isabelle. Multiple resonances in arrays of spiral resonators designed for magnetic resonance imaging. In: Microwave & Optical Technology Letters, Vol. 50, no. 7, p. 1945-1950 (2008)
Permanent URL http://hdl.handle.net/2078.1/36600