2010/05/21 by Ganquan Xie, Ganquan Xieand, Jianhua Li +6 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #Electromagnetic Scattering and Analysis #FOS: Physical sciences #General Physics (physics.gen-ph) #Metamaterials and Metasurfaces Applications #Optics (physics.optics) #physics.gen-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1005.3999
We propose a new EM cloak without exceed light speed violation and without infinite speed violation. 14 pages and 24 figures are in this paper. A novel front branching and crescent like front propagation is presented. Please send comments to [email protected] or [email protected]. It is academical publication. If some colleague refer our paper, please cite it as reference
arxiv created 2010/05/21 · openalex publication_date 2010/05/21 · arxiv updated 2011/07/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this paper, we propose new Global and Local (GL) electromagnetic (EM) cloaks with distinctive class material aαβlog α(bαβ/h) hβ(GLLH Cloak) without exceed light speed violation. The refractive index of the GLLH cloak material, n(r), is large than one or equal to one. Our GLLH cloak is created by GL EM modeling and GL EM cloak inversion with searching class \it aαβlog α(bαβ/h) hβ. The GLLH cloaks in this paper have finite speed and have no exceed light speed? physical violations and have more advantages. The GLLH EM cloaks can be practicable by using normal materials and are available for all broad frequency band. The GL EM cloak inversion and electromagnetic integral equation for cloak are presented in this paper. The novel EM wave propagation and front branching in the GLLH cloak by GL EM modeling are presented in this paper. The EM wave front propagation in GLLH cloak is behind of the front in free space. At time steps 118 dt, in the GLLH cloak, the wave front is curved as a crescent like and propagates slower than the light in free space. At the time step 119dt, the EM wave inside of the GLLH cloak propagates slower than light speed, moreover, its two crescent front peaks intersect at a front branching point. At the front branching point, the front is split to two fronts. The novel front branching and crescent like wave propagation are displayed in the following figure 1, figure 2 and figures 5 -20 in this paper. All copyright and patent of the GLLH EM cloaks and GL modeling and inversion methods are reserved by authors in GL Geophysical Laboratory.