Showing papers on "Metamaterial antenna published in 1976"

Linearly polarized microstrip antennas

Abstract: An equivalent network for square and rectangular shaped microstrip radiating elements is derived. In order to simplify the problem the radiating element is considered as two slots separated by a transmission line of low characteristic impedance. The slots are characterized by their radiation pattern, directivity, and equivalent admittance. A design procedure for open circuit halfwave resonators and for arrays of such resonators is given. Finally, some antennas in the X band are designed and measured.

Electromagnetic Field, in a High Frequency Range, of High-Voltage Transmission Lines and Its Effects on the Response of a Terminated One-Wire Transmission Line Set Near the Ground

Abstract: In this paper we shall present two useful calculations in electromagnetic compatibility works. A computational procedure is developped for a quick prevision of the electromagnetic field inten­ sity in the proximal region of a finite overhead line in the frequency range dc-30 MHz. The classical theory of dipole radiation in the presence of a conducting earth is combined with an accurate digital integration technique to provide a solution that is both accurate and straight forward. The response and current distribution of a terminated one-wire transmission line set.over the ground and excited by a non-uniform electromagnetic field is given. The earth conduction effects are con­ sidered. The purpose of such studies is to determine the electromagnetic interferences on data transmission lines arising from the electric resonance of the con­ necting bar in a high-voltage transformer station. A comparison between computer results and experimental measurements is provided.