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This paper continues the discussion of the design of an antenna with collinear electric- and magnetic-dipole moments out of phase by approximately π/2 (90°). Using a high-Q approximation, a switched oscillator is matched to the antenna for radiating an oscillatory pulse.
We investigate the Discontinuous Galerkin-Finite Element Method (DG-FEM) for the solution of Maxwell's equations in the time domain. Divergence laws are known to be violated by this formulation, which consequently gives rise to spurious charges in numerical simulations. It is however, possible to impose additional constrains within the framework of DG-FEM and so obtain a “clean” solution spectrum...
This paper describes the design and numerical simulations of a switch system to launch fast (100 ps), high-voltage (>100 kV) spherical TEM waves from the first focal point of a prolate-spheroidal impulse-radiating antenna.
To calculate the scattering from thin dielectric-coated perfect electric conductor (PEC) surfaces, the impedance boundary conditions (IBC) and thin dielectric sheet (TDS) approximation are quite powerful in integral equation method because both remove the need to solve the field in dielectric layer. However, the rigid validation criteria restrict the application scope of IBC method. Although the TDS...
If the RCS of a target is measured in measurement facility which is not a Faraday cage, this RCS might be corrupted by eventual outside transmissions which fill the same spectral band than measurement. In this situation, outside radiations are going to pollute the value of the measured RCS and as a consequence their level must be reduced in order to be able to get correct values of RCS. This article...
It has been recently shown that in the case of scattering by a perfect electric conductor, it is possible to have a convergent Method of Auxiliary Sources (MAS) field due to divergent MAS currents. These conclusions are extended in the present paper for the case of the implementation of MAS to dielectric scattering problems. The main differences are pointed out, which regard the existence of two critical...
We describe the application of a high order Discontinuous Galerkin method in the time domain for Plasma Wakefield Acceleration (PWFA) simulations. The method is characterized by very low numerical dispersion errors. Furthermore, it is explicit by construction and easily parallelizable. It provides a much better alternative for particle based simulations compared to the conventional FDTD method. In...
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