185 citations · 225 across the 3 of their papers we have counts for
5 papers
Metamaterial radiofrequency lens for magnetic resonance imaging
Manuel J. Freire, Ricardo Marques, Lukas Jelinek +2
The purpose of this work is to test the ability of a new class of passive electromagnetic device to increase the penetration depth of phased arrays of surface coils for magnetic re…
Experimental demonstration of a mu=-1 metamaterial lens for magnetic resonance imaging
Manuel J. Freire, Ricardo Marques, Lukas Jelinek
In this work a mu=-1 metamaterial (MM) lens for magnetic resonance imaging (MRI) is demonstrated. MRI uses surface coils to detect the radiofrequency(RF) energy absorbed and emitte…
Near-field imaging in the megahertz range by strongly coupled magnetoinductive surfaces: theoretical model and experimental validation
Manuel J. Freire, Ricardo Marques
In this work, near-field imaging by two strongly coupled arrays of split ring resonators is analyzed. A simple theoretical model is developed to obtain the transfer function of the…
Three dimensional super-resolution in metamaterial slab lenses
F. Mesa, R. Marques, M. Freire +1
This letter presents a theoretical and experimental study on the viability of obtaining three dimensional super-resolution (i.e. resolution overcoming the diffraction limit for all…
A planar magneto-inductive lens for three-dimensional subwavelength imaging
Manuel J. Freire, Ricardo Marques
A planar near-field magnetoinductive lens operating in the microwave range is presented. The proposed device consists of two parallel planar arrays of metallic broadside coupled (B…