Adrián Grande

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In this paper, we present a novel finite-difference time-domain model of transient wave propagation in general dispersive bi-isotropic media with losses. The special properties of these materials may lead to new applications in microwave and millimeter-wave technology. While their frequency-domain properties have been well described in the literature, their(More)
A transmission-line matrix model suitable to model the propagation of electromagnetic (EM) waves in bi-isotropic media is presented. The main characteristic of the EM response of such complex media is the cross coupling of the EM field vectors in their constitutive relations. In this study, the angle tilt between electric and magnetic field vectors, the(More)
In this paper, a multiresolution in time domain (MRTD) method is used to model the propagation of transient signals through dispersive chiral media. The modeling of these media requires the computation of convolution integrals, whose resolution level may be increased by introducing wavelets in the time dependence of the fields.
As part of the present wave of interest in electromagnetic propagation in complex materials (left-handed, chiral, nonreciprocal, nonlinear, etc.), a special mention may be made to bi-iso‐ tropic materials. After a period of relevance during the nineties [1-4], nowadays they enjoy a renewed interest, because of new fabrication techniques that allow the use(More)
This paper introduces an extension of the original finite-difference time-domain (FDTD) method for modeling double-negative media characterized by high-order frequency-dependent permittivity and permeability. The approach basically consists of adding electric and magnetic current densities to Maxwell's curl equations and considering Ohm's law as a(More)
The original finite-difference time-domain (FDTD) method is extended to incorporate partially magnetized ferrites, which are characterized by a well-known empirical permeability tensor. With the aim of studying the numerical features (stability and accuracy) of the resulting FDTD algorithm, we have considered the propagation of plane-waves along(More)
The interaction between fluids and bodies is a complex phenomenon which is behind the forces observed in flight. Here we analyze the main aerodynamics forces, lift and drag, in several wing profiles and a cylinder. We consider the two main parameters of study, the drag and lift coefficients. These parameters were measured by using a wind tunnel for(More)
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