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Getsinger's Longitudinal Section Electric model describing the propagation characteristics of a single layer microstrip line is modified to cater for `n' layers. An accurate closed-form expression for two and three layered structures is presented and validated against full-wave numerical results. The computed effective permittivity for a randomly selected two and three layer dielectric microstrip...
We investigate the electronic structure of a superconductor in proximity of nanoscale ferromagnets (SC/FM hybrids) and find that a wide variety of superconducting order parameter landscape can be achieved by varying the parameters and the magnetic state of the nanomagnets. In particular, we propose an energy-angular momentum dispersion ε(l)) with the energy minimum at 1 ≠ 0 in systems with superconductivity...
We present a hybrid modeling approach for the modeling of 2D-waveguides in layered media based on an embedding envelope. The inner domain is treated spatially, and the outer domain is treated partly spatially for the direct terms, and partly spectrally for the reflected terms.
Precursor wave occurs when wideband electromagnetic pulse propagates through temporally dispersive and absorptive media. In this paper, the mechanisms of precursor wave generation and propagation in lossy and dispersive media are studied for radar pulses with different rise time and carrier frequencies. Simulation results are presented to discuss the possibility of precursor waves generated through...
In this paper an original acceleration scheme for the computation of periodic multilayered mixed-potential Green's functions is used to perform numerical dispersive analyses in bidimensional periodic structures embedded in a dielectric slab. The acceleration scheme is first described with reference to the various components of the dyadic and scalar potentials. The Green's functions are then implemented...
This paper presents a mixed-potential integral-equation formulation for analyzing 1-D periodic leaky-wave antennas in layered media. The structures are periodic in one dimension and finite in the other two dimensions. The unit cell consists of an arbitrary-shaped metallic/dielectric structure. The formulation has been implemented in the EIGER™ code in order to obtain the real and complex propagation...
The finite element-boundary integral-multilevel fast multipole algorithm (FE-BI-MLFMA) has shown to be very general and powerful for 3D scattering. To efficiently model cavity targets, a concave FE-BI-MLFMA is presented in this paper, which can significantly reduce the dispersion error from the FEM and improve the efficiency of FE-BI-MLFMA especially for nonuniform cavities. To eliminate the problem...
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