Journal article
Level Set-Based Topology Optimization for the Design of an Electromagnetic Cloak With Ferrite Material
This paper presents a structural optimization method for the design of an electromagnetic cloak made of ferrite material. Ferrite materials exhibit a frequency-dependent degree of permeability, due to a magnetic resonance phenomenon that can be altered by changing the magnitude of an externally applied dc magnetic field.
Thus, such ferrite cloaks have the potential to provide novel functions, such as on-off operation in response to on-off application of an external magnetic field. The optimization problems are formulated to minimize the norm of the scattering field from a cylindrical obstacle. A level set-based topology optimization method incorporating a fictitious interface energy is used to find optimized configurations of the ferrite material.
The numerical results demonstrate that the optimization successfully found an appropriate ferrite configuration that functions as an electromagnetic cloak.
| Language: | English |
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| Publisher: | IEEE |
| Year: | 2013 |
| Pages: | 2081-2084 |
| ISSN: | 19410069 and 00189464 |
| Types: | Journal article |
| DOI: | 10.1109/TMAG.2013.2239965 |
cylindrical obstacle electromagnetic cloak design external magnetic field externally applied dc magnetic field ferrimagnetic resonance ferrite ferrite cloaks ferrite configuration ferrite material ferrites fictitious interface energy frequency-dependent permeability degree invisibility cloaks level set-based topology optimization level-set method magnetic resonance metamaterials on-off operation optimisation optimization problems scattering field structural optimization method topology topology optimization
