Title :
VHF-UHF propagation performance predictions for low altitude communication links operating over water
Author :
Ekstrom, Joel L.
Author_Institution :
Motorola, McLean, VA, USA
Abstract :
The Kerr (MIT Rad Lab Vol. 13) graphical approximation for the height-gain functions used in trans-horizon diffraction propagation field strength computations are modified so as to be valid, assuming wavelengths of 3 meters or less, for all surface media, both polarizations, and low antenna heights down to zero. The modifications are particularly important for VHF-UHF vertically polarized propagation over sea water between low altitude electromagnetic platforms
Keywords :
UHF radio propagation; VHF radio propagation; antenna theory; electromagnetic wave diffraction; electromagnetic wave polarisation; military communication; mobile antennas; seawater; VHF-UHF vertically polarized propagation; antenna heights; field strength computations; graphical approximation; height-gain functions; low altitude communication links; low altitude electromagnetic platforms; sea water; Computer vision; Diffraction; Earth; Electromagnetic propagation; Polarization; Propagation losses; Radio transmitters; Sea surface; Surface waves; Systems engineering and theory;
Conference_Titel :
Military Communications Conference, 1993. MILCOM '93. Conference record. Communications on the Move., IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0953-7
DOI :
10.1109/MILCOM.1993.408597
