Understanding and predicting electromagnetic behavior is needed more and more in modern technology. The Finite-Difference Time-Domain (FDTD) method is a powerful computational electromagnetic technique for modelling electromagnetic space. However, the computation of this method is complex and time consuming. Implementing this algorithm in hardware will greatly increase its computational speed a...

The scattering of electromagnetic waves by a resonator is determined the excitation eigenmodes system. In case open resonators made absorbing materials, system non-Hermitian, and are quasinormal modes. Among whole set modes, static modes (modes with zero eigenfrequency) occupy specific place. We study role in expansions calculated numerical solver implemented finite-element method. show that, d...

a complete linear theory in four dimensional space-time is constructed for propagation and coupling of electromagnetic waves in the most general case, i.e. media where all three space directions are in homogeneous and where temporal changes, anisotropy and absorbtion are also included. the only condition is that the properties of the medium should be slowly varying, although it is assumed that ...

Composite elastomer microwave absorbers were developed based on two-phase hybrid filler. Nanosized magnetite was synthesized for the first time in porous texture of activated carbon. Combination fillers with high dielectric losses such as active carbon, and magnetic into filler is considered a new Hightech generation specific technical characteristics. The influence obtained shielding effective...

Wave absorbing materials are widely used to prevent military equipment from being detected by radar wave and also serve as civil electromagnetic shielding. The properties of determined a combination the parameters thickness composite material. In actual case, theoretically designed reflection loss peak intensity bandwidth deviate engineered values. There few reports on mechanism about variation...

We show that a weakly absorbing, strongly scattering (white) medium can be made very strongly absorbing at any frequency within its strong-scattering bandwidth by optimizing the input electromagnetic field. For uniform absorption, results from random matrix theory imply that the reflectivity of the medium can be suppressed by a factor ∼(ℓ(a)/ℓ)N(-2), where N is the number of incident channels a...

This paper is devoted to the derivation of absorbing boundary conditions for the KleinGordon and Dirac equations modeling quantum and relativistic particles subject to classical electromagnetic fields. Microlocal analysis is the main ingredient in the derivation of these boundary conditions, which are obtained in the form of pseudodifferential equations. Basic numerical schemes are derived and ...