DC magnetic concentrator and omnidirectional cascaded cloak by using only one or two homogeneous anisotropic materials of positive permeability
2013 (English)In: Progress In Electromagnetics Research, ISSN 1070-4698, E-ISSN 1559-8985, Vol. 142, 683-699 p.Article in journal (Refereed) Published
A novel concentrator for static magnetic field enhancement is proposed and designed utilizing transformation optics. Compared with other devices for static magnetic field enhancement, our device has many good features: first, our concentrator can achieve a DC magnetic field enhancement in a relatively large free space with high uniformity. Secondly, our concentrator is composed by only one or two homogenous anisotropic materials with principal value greater than zero (without any infinitely large or zero value), which can be achieved by using currently available materials. Thirdly, the geometrical shape of the proposed device determines the enhancement factor and the permeability of the device. After choosing suitable geometrical parameters, we can obtain a concentration with a suitable enhancement factor and a material requirement that is easily achievable. The proposed concentrator will have many important applications in many areas (e.g., magnetic resonance imaging and magnetic sensors). Based on the same theoretical model, we also proposed a cascaded shielding device cloak for static magnetic fields. The proposed DC magnetic shielding device can be realized without using any material of zero permeability, and will have potential applications in, e.g., hiding a metallic object from being detected by a metal locator.
Place, publisher, year, edition, pages
2013. Vol. 142, 683-699 p.
Anisotropic material, Enhancement factor, Geometrical shapes, Magnetic concentrator, Material requirements, Static magnetic fields, Theoretical modeling, Transformation optics
Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-139194DOI: 10.2528/PIER13092509ISI: 000327478000040ScopusID: 2-s2.0-84885908717OAI: oai:DiVA.org:kth-139194DiVA: diva2:686073
FunderSwedish Research Council, 621-2011-4620
QC 201401102014-01-102014-01-082014-11-05Bibliographically approved