Title :
The effect of human presence on signal power received at a TETRA handheld device
Author :
Asimakopoulos, A.G. ; Rittas, N.E. ; Xenikos, D.G. ; Polydoros, P.I. ; Constantinou, P.
Author_Institution :
Mobile Radio-Commun. Lab., Nat. Tech. Univ. of Athens, Greece
Abstract :
The attenuation of the radio signal in the nearfield of a TETRA handheld device due to the presence of human body is measured. By including a confidence margin for the mean and the standard deviation of the measurements we find in open area 8.4 dB attenuation when the handheld device is at talking position close to the head and 19.3 dB when it is placed at the belt. In an urban environment the corresponding values are 11.2 and 9.2 dB, respectively. Detailed measurements are presented and discussed.
Keywords :
biological effects of radiation; cellular radio; digital radio; electromagnetic wave absorption; health hazards; losses; mobile handsets; signal detection; telecommunication equipment testing; TETRA cellular digital communications system; TETRA handheld device; belt position; confidence margin; human presence effect; open area; radio signal attenuation; received signal power; standard deviation; statistical mean; talking position; urban environment; Area measurement; Attenuation; Base stations; Handheld computers; Humans; Laboratories; Portable computers; Position measurement; Scattering; Urban areas;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2004. IMTC 04. Proceedings of the 21st IEEE
Print_ISBN :
0-7803-8248-X
DOI :
10.1109/IMTC.2004.1351254
