Title :
Design of electromagnetic cloaks for generalized superellipse using coordinate transformations
Author :
Yao, K. ; Li, C. ; Li, F.
Author_Institution :
Inst. of Electron., Chinese Acad. of Sci., Beijing
Abstract :
Invisibility cloaks for generalized superellipse are proposed and investigated. Spatial coordinate transformation approach in polar coordinates form is applied to design the electromagnetic constitutive parameters. The required material properties, which do not involve discontinuities in the cloak shell, are derived in general form, and the cloaking performance is found relates to the properties of the shape to be cloaked. Fullwave finite element simulations are given to confirm the validity of the design, where the cloaking device is illuminated by plane waves and cylindrical waves, respectively. The proposed design provides a possible approach for cloaking many objects with reduced symmetry in shape.
Keywords :
electromagnetic fields; finite element analysis; metamaterials; optical materials; cloaking device; coordinate transformation; electromagnetic cloak design; fullwave finite element simulations; superellipse; Electromagnetic propagation; Equations; Finite element methods; Jacobian matrices; Microwave propagation; Optical materials; Optical propagation; Optical scattering; Shape; Tensile stress;
Conference_Titel :
Metamaterials, 2008 International Workshop on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-2608-9
Electronic_ISBN :
978-1-4244-2609-6
DOI :
10.1109/META.2008.4723552