Open AccessWideband Cloaking of Objects With Arbitrary Shapes Exploiting Adjoint Sensitivities
Author(s) -
Laleh S. Kalantari,
Mohamed H. Bakr
Publication year - 2016
Publication title -
ieee transactions on antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.652
H-Index - 200
eISSN - 1558-2221
pISSN - 0018-926X
DOI - 10.1109/tap.2016.2521880
Subject(s) - fields, waves and electromagnetics , aerospace , transportation , components, circuits, devices and systems
We propose an effective approach for optimal wideband cloaking of objects with arbitrary shapes exploiting adjoint sensitivity analysis. Our method optimizes the voxel-by-voxel constitutive parameters of an anisotropic cloak resulting in a large number of optimizable parameters. The associated sensitivities of a wideband cloaking objective function are efficiently estimated using our in-house anisotropic adjoint variable method (AVM) simulator. Only one adjoint simulation is needed regardless of the number of required sensitivities. A gradient-based optimization algorithm utilizes the available sensitivity information to iteratively improve the wideband cloaking objective function and to determine the constitutive parameters of the optimal cloak.