In this paper, a new design of demultiplexer based on two-dimensional photonic crystal ringresonator is proposed. The structure is made of a hexagonal lattice of silicon rods with therefractive index 3.46 in coefficient of air with refractive index 1. The transmission efficiencyand Quality factor for our proposed demultiplexer, respectively, are more than 65% and1600. The normalized transmissio...

A breast cancer detection technique using multi-static radar is proposed herein. For the first time, images are produced using this technique, using backscatter data produced from an anatomically realistic 2D MRI-derived FDTD model of the breast. Successful detection of a 2-mm-diameter tumour is demonstrated, although clarity of detection is dependent on mitigating antenna mutual coupling and s...

A breast cancer detection technique using multi-static radar is proposed. For the first time, images are produced using this technique, using backscatter data produced from an anatomically realistic 2D MRI-derived FDTD model of the breast. Successful detection of a 2 mm-diameter tumour is demonstrated, although clarity of detection is dependent on mitigating antenna mutual coupling and skin ref...

This paper presents the studies of time domain inverse scattering for a two dimensional homogeneous dielectric cylinder buried in a half-space which based on the finite difference time domain (FDTD) method and the dynamic differential evolution (DDE). For the forward scattering, the FDTD method is employed to calculate the scattered E fields, while for the inverse scattering the DDE scheme are ...

Ultra-short pulse is a promising technology for achieving ultra-high data rate transmission which is required to follow the increased demand of data transport over an optical communication system. Therefore, the propagation of such type of pulses and the effects that it may suffer during its transmission through an optical waveguide have received a great deal of attention in the recent years. O...

Abstract. The finite-difference time-domain (FDTD) model of electromagnetic wave propagation in the Earth–ionosphere cavity was developed under assumption an axisymmetric system, solving reduced Maxwell equations a 2D spherical coordinate system. validated on different conductivity profiles for electric and magnetic field components various locations Earth along meridian. characteristic altitud...

The purpose of this study is to establish a whole-body averaged specific absorption rate (WB-SAR) experimental estimation method using the total power absorbed by humans; a cylindrical-external field scanning technique is used to measure the radiated RF (radiofrequency) power. This technique is adopted with the goal of simplifying the exposure dosimetry of humans of different postures and/or si...