We demonstrate that electromagnetic waves propagating in square and hexagonal photonic crystals can have fundamentally different anisotropy properties. The wave frequency and group velocity can be functions of the propagation direction even for vanishingly small wave numbers (near the gamma-point). This anisotropy, present in square but absent in hexagonal lattices, can be so extreme that the g...

Ground waves and sky waves measured 209 km and 250 km south of six triggered lightning flashes containing 30 strokes that occurred in the half-hour before sunset on 27 August 2015 are presented and analyzed. We use a cross-correlation technique to find the ionospheric effective reflection height and compare our results to previous techniques that calculate effective height based on the time del...

Today, marine radar-image sequences are used on an operational basis to measure ocean surface wave parameters [1] [2]. In addition, they have shown to be useful in measuring the evolution of individual waves in time and space [3] [4], current and bathymetry fields [5] [6] [7] as well as surface wind fields [8]. The typical marine radar systems used for these applications operate in the X-band a...

The issue of humanitarian demining becomes increasingly important in the modern world. In the light of this, one of the most urgent problems to be solved is the development of new more effective and safer methods of land mine detection. The idea, which forms the essence of this paper, is based on using scattering of Rayleigh surface waves on buried land mines for their remote detection (at dist...

Doped graphene, a one-atom-thick but highly conductive sheet, provides us with an unprecedented platform to explore surface plasmon and two-dimensional optics in a regime that can hardly be obtained with noble metals or conventional electron gases. Theoretical calculations show that graphene surface plasmon (transverse magnetic mode) shows extraordinarily tight confinement and short wavelength....

Transmission and reflection are two fundamental properties of the electromagnetic wave propagation through obstacles. Full control of both the magnitude and phase of the transmission and reflection independently are important issue for free manipulation of electromagnetic wave propagation. Here we employed the equivalent principle, one fundamental theorem of electromagnetics, to analyze the req...

This paper presents a reliability based design study of multilayered composites for electromagnetic interference shielding applications. In this study, uncertainties in the design and external variables affecting the shielding effectiveness (SE) are modeled based on probability distributions. Monte Carlo simulation is employed at each design point generated via Latin hypercube sampling approach...

The conversion between seismic and electromagnetic energies was discovered in a fluidfilled porous formation. When seismic waves propagate through a fluid-saturated porous formation, relative motion between the pore fluid and the solid matrix is generated and cation motion in the fluid is formed. The streaming electric current induces electromagnetic waves in the formation. There is an opposite...

Metal antennas currently in implementation use metallic conductor as guiding medium for electromagnetic Radiations. Plasma antennas uses ionized medium. The plasma antenna is a radiofrequency antenna formed by a plasma columns, filaments or sheets, which are excited by a surface wave. The relevance of this device is how rapidly it can be turned on and off only applying an electrical pulse. In t...

The objective of this paper is to design impedance surfaces for the solution of the problem of electromagnetic compatibility of antennas. In a recent paper, corresponding surfaces were used to reduce coupling between antennas located on a plane. These surfaces were made artificially, e.g., by loading a conducting surface with corrugations. The design of the impedance structure is done for a giv...