In this paper, a finite difference time domain (FDTD) method is applied to investigate capabilities of an ultrawide band (UWB) radar system to detect and locate a breast tumor. The first part of these investigations concerns a phantom formed by a circular cylindrical plastic container with liquid and a small highly reflecting target. In the second part, a three-dimensional numerical breast mode...

A surface electromagnetic wave called the Dyakonov-Tamm wave has been theoretically predicted to exist at the interface of two dielectric materials at least one of which is both anisotropic and periodically nonhomogeneous. For experimental confirmation, a prism-coupled configuration was used to excite Dyakonov-Tamm waves guided by the interface of a dense thin film of magnesium fluoride and a c...

Metasurface have recently generated much interest due to its strong manipulation of electromagnetic wave and its easy fabrication compared to bulky metamaterial. Here, we propose the design of a multi-spectral metasurface that can achieve beam deflection and broadband diffusion simultaneously at two different frequency bands. The metasurface is composed of two-layered metallic patterns backed b...

Whispering gallery modes are specific resonances (or modes) of a wave field that are confined inside a given resonator (cavity) with smooth edges due to continuous total internal reflection. The most interesting from a practical viewpoint are electromagnetic whispering gallery modes, since they posses many unique properties, such as ultra-high Q-factors, low mode volumes, small sizes of resonat...

Sea ice plays an important role in global climate. Many researches focus on the measurement of the sea ice thickness. In this paper, we present a method for the ice-detecting combining frequencymodulated continuous-wave (FMCW) technology and synthetic aperture radar (SAR) technology. It can provide a good resolution both in the range dimension and the azimuth one. Then a simulation is conducted...

Type II superconductors will be considered as macroscopic quantum gravitational antennas, which can simultaneously also be used as efficient transducers for converting electromagnetic radiation into gravitational radiation, and vice versa. A Meissner-like effect, in which the LenseThirring field associated with a gravity wave is expelled from the interior of the superconductor, is predicted. An...

In this paper, we study the quasinormal modes for scalar, electromagnetic, and gravitational axial perturbations in Hayward regular black hole surrounded by quintessence (HBH-[Formula: see text]). Using third-order WKB approximation, can determine dependence of on parameters test fields. We also greybody factor, giving transmission reflection coefficients scattered wave through effective potent...

The present paper offers a numerical model which can be applied for the simulation of wave height distribution on a 2-D horizontal soft mud layer. The model is based on mild slope equations and it includes combined wave refraction, diffraction, reflection and breaking. The high energy dissipation of wave height due to the presence of fluid mud layer has also been simulated. Wave height attenuat...