GLLH EM Invisible Cloak With Novel Front Branching And Without Exceed Light Speed Violation
Description
GLLH EM Invisible Cloak With Novel Front Branching And Without Exceed Light Speed Violation, Extensive abstract We propose new Global and Local (GL) electromagnetic (EM) cloaks with a distinctive class of materials (GLLH cloak) without superluminal propagation. Preprint first version published in arXiv:1005.3999, on May 21, 2010. In the first of the world, The GLLH EM invisible cloak is complete invisible cloak without superluminal propagation. The refractive index of the GLLH cloak material, is greater than one or equal to one. Our GLLH cloak is created by GL EM modeling and GL EM cloak inversion with searching class, . The GLLH cloaks in this paper have finite speed, exhibit no superluminal physical violations, and offer additional advantages. The GLLH EM cloaks can be practical using normal materials and are applicable over a broad frequency band. The GL EM cloak inversion and electromagnetic integral equation for the cloak are presented in this paper. The novel EM wave propagation and front branching in the GLLH cloak by GL EM modeling are also presented. At time step 118 dt, in the GLLH cloak, the wave front is curved like a crescent. At time step 119 dt, its two crescent front peaks intersect at a front branching point, where the front splits into two. The novel front branching and crescent- like wave propagation are displayed in the Figure 1, Figure 2, and figures 5 -20 in this paper. From the GLLH invisible cloak, we discovered positive space and negative space and invisible science; isotropic electromagnetic invisible GLHUA, A sphere; anisotropic electromagnetic invisible GLHUA cloak. In 2001, we used Global Integral and Local Differential (GILD) EM modeling and inversion to detect the fly model imaging from EM sources in some frequency band. A strange cloak phenomenon was discovered in the residual field. The cloak protects the fly object from the exterior EM field detection in Figure 2, which image is match with Figure 1. We called the strange phenomena as GILD effect and published it in paper [1]. In this paper, We present the cloaks imaging again in Figure 3 and Figure 4. To investigate the strange double layer clothes phenomenon , we developed the Global and Local field electromagnetic modeling method [ 2 ] and GL Metro Carlo inversion method [ 3 ]. These new methods are completely different from the traditional finite difference scheme [ 4 ] and finite element method [ 5 ]. The GL method has total advantages over the traditional methods. Large matrix solving costs and error reflections on artificial boundaries are difficulties in traditional numerical simulation methods. The GILD EM modeling and inversion [ 6 ] represent important progress in overcoming these difficulties. The GL EM modeling and GL Metro Carlo inversion have advantages in completely overcoming these historical difficulties [ 2 , 3 ]. We used GL EM modeling and inversion to propose the GLLH cloak.