Title :
Finite-difference time-domain simulations of approximate ground-plane cloaks
Author :
Kallos, Efthymios ; Song, Wei ; Argyropoulos, Christos ; Hao, Yang
Author_Institution :
Dept. of Electron. Eng. & Comput. Sci., Queen Mary Univ. of London, London, UK
Abstract :
In this paper we use a coordinate transformation to create a cloak that covers a triangular-shaped conducting object placed on a ground plane. A finite-difference time-domain (FDTD) algorithm that uses non-orthogonal mesh cells (NFDTD) is initially utilized to test the full cloak. Using the coordinate transformation method, we have designed a ground-plane cloak that is an approximate version of the full scale cloak. Despite its simple structure, which consists of only 16 blocks of all-dielectric materials, the approximate cloak is found through FDTD simulations to work very well when an incident pulse is impinging on an object placed on a flat ground plane. The scattering signature is significantly suppressed and we expect such cloaks to be fairly easy to implement in reality.
Keywords :
approximation theory; conducting bodies; dielectric materials; electromagnetic wave scattering; finite difference time-domain analysis; FDTD simulation; approximate ground-plane cloak; coordinate transformation method; dielectric material; finite-difference time-domain analysis; nonorthogonal mesh cell; scattering signature; triangular-shaped conducting object; Anisotropic magnetoresistance; Computational modeling; Conducting materials; Dielectric materials; Finite difference methods; Magnetic materials; Permeability; Permittivity; Testing; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2009. APSURSI '09. IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
978-1-4244-3647-7
DOI :
10.1109/APS.2009.5172327
