Title :
Measurements process of vertically polarized electromagnetic surface-waves over a calm sea in the HF band over a spherical earth
Author :
Bellec, M. ; Jezequel, P.Y. ; Palud, S. ; Colombel, F. ; Avrillon, S. ; Pouliguen, P.
Author_Institution :
TDF - Centre de Mesure d´Antennes, Rennes, France
Abstract :
A HF surface-wave experimentation across a 220 km sea water path is carried out at 5, 10, and 20 MHz in order to evaluate the relative field strength attenuation with distance and beyond the horizon with a low measurement uncertainty. Although the theories are well known, the experimentation is described from the transmitter´s implementation until the RF equipment in order to improve the signal to noise ratio. The measurement setup described proves the reliability of the data.
Keywords :
HF radio propagation; electric field measurement; electromagnetic wave attenuation; electromagnetic wave polarisation; seawater; surface electromagnetic waves; HF surface-wave experimentation; RF equipment; distance 220 km; frequency 10 MHz; frequency 20 MHz; frequency 5 MHz; low measurement uncertainty; relative field strength attenuation; sea water path; signal to noise ratio; spherical earth; transmitter; vertically polarized electromagnetic surface-waves; Antenna measurements; Antenna radiation patterns; Frequency measurement; Permittivity; Permittivity measurement; Transmitting antennas; HF band measurements; spherical Earth models; surface-waves propagation; vertical electric dipole;
Conference_Titel :
Antennas and Propagation (EuCAP), 2015 9th European Conference on
