Investigation of time‐domain characteristics of thin‐wire antennas

Abstract

CONCLUSIONThis paper has introduced a new numerical scheme to analyse the forward problem in microwave tomography systems, which was governed by the wire-volume electric-field integral equations. The triangular function and volumetric rooftop function are chosen as the basis functions to approximate the unknowns. The Bi-CG method was employed to solve the system of linear equations. The measured and numerical results have been presented and their comparison demonstrates that this scheme is efficient, and that the 2D method is inaccurate even, when the system has a simple antenna subsystem of two dipoles, one transmitter and one receiver. Microwave Theory Tech 38 (1990), 981-980. 5. R. Kleinman and P. van der Berg, A modified gradient method for two-

Pulse waveforms for 60 GHzM‐ary pulse position modulation communication systems

“…For orthogonal PPM, the additional time shift, δ, satisfies δ ≥ T p , whereas for non-orthogonal PPM δ < T p . The distortion of the ultra-short pulses because of the antenna was examined in [19,20]. This distortion increases as the bandwidth increases, and this can significantly affect performance [21,22].…”

Aspects on the Phase Delay and Phase Velocity in the Electromagnetic Near-Field

“…The phenomenon is relevant, in particular, in applications involving very large bandwidths, where the distortion of the signal waveform causes problems. Some recent papers, e.g., [5][6][7], deal with this subject, although from the point of view of the time-domain response of finite length wire structures in the radiation zone. In the present paper, however, the attention is focused on the simplest of radiators, the infinitesimal dipole, and especially the near-field it produces.…”