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We present a simple analytical model for the dispersion of a pulse radiated by a self-complementary logarithmic-periodic antenna. The model predicts the variation in the spectral phase, and explains the underlying mechanism behind it. The variation in the spectral phase predicted by the model is compared with the spectral phase measured with a Terahertz (THz) Time Domain System (TDS) System that uses...
We present a full-wave numerical tool for the simulation of plasma antennas. The tool makes use of a hybrid formulation that allows treating the plasma with a Finite Element discretization, and the metallic parts with the Method of Moments. The finite element discretization is solved using a state-of-the-art sparse solver (MUMPS) in order to reduce the computational time at a minimum. The accuracy...
We report the numerical analysis of a plasma antenna array comprised of cylindrical plasma discharges and a conventional half-wavelength metallic dipole. In particular, the 3D radiation pattern, gain and impedance of the antenna are determined and compared for different values of the plasma density. To reduce the computational load by exploiting the translational symmetry of the structure, we have...
We present the numerical analysis of a reconfigurable plasma antenna array (PAA) comprised of a metallic half-wavelength dipole and a variable number of cylindrical plasma tubes that are arranged in a planar rectangular lattice. Our simulations, carried out with the linear embedding via Green's operators (LEGO) method, indicate that beam-forming and beam-steering can be realized and controlled by...
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