Title :
Very near ground radio frequency propagation measurements and analysis for military applications
Author :
Foran, R.A. ; Welch, Thad B. ; Walker, Michael J.
Author_Institution :
Dept. of Electr. Eng., US Naval Acad., Annapolis, MD, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
We analyze, using a 2-ray model, the effects associated with placing a man-portable radio transceiver very near the ground (3-28 cm). A significant decrease in signal strength occurs when a soldier drops from the crouched position to the prone position. As much as a 16.8 dB decrease in signal strength was observed. This effect is more pronounced at short ranges, even without obstructions in the signal path. The Rician k factor generally decreases as the antenna height is lowered. The assumed 2-ray propagation model is only appropriate when the Rician k factor is much greater than zero
Keywords :
Rician channels; antenna arrays; antenna radiation patterns; land mobile radio; military communication; mobile antennas; radiowave propagation; transceivers; 2-ray propagation model; 3 to 28 cm; RF propagation analysis; Rician k factor; antenna array pattern; antenna height; crouched position; man-portable radio transceiver; military applications; path loss link budget; prone position; short ranges; signal path; signal strength; very near ground RF propagation measurements; Antenna feeds; Antenna measurements; Antennas and propagation; Dipole antennas; Floors; Frequency measurement; Geometry; Radio frequency; Radio transmitters; Rician channels;
Conference_Titel :
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-5538-5
DOI :
10.1109/MILCOM.1999.822699
