Title :
Antenna efficiency of handheld phones
Author :
Pedersen, Gert Frerlund ; Olesen, Kim ; Larsen, Steen Leth
Author_Institution :
Center for Personkommunikation, Aalborg Univ., Denmark
Abstract :
Measurements in an anechoic room of three-dimensional radiation patterns for 42 test persons using a handheld phone with two antennas are investigated in order to find the body loss. The measured efficiency range from 0.9 dB to 17 dB. From the measurements is was possible to separate the absorption and the loss due to mis-match of the antenna. The antenna mis-tuning accounted for less than 2 dB to the body loss. The uncertainties in the measurements is in the order of one dB
Keywords :
telephone sets; 3D radiation patterns measurement; absorption; anechoic room; antenna efficiency; antenna mis-match; antenna mis-tuning; body loss; efficiency range; handheld phones; measurement uncertainties; mobile systems; test persons;
Conference_Titel :
Electromagnetic Assessment and Antenna Design Relating To Health Implications of Mobile Phones (Ref. No. 1999/043), IEE Seminar on
Conference_Location :
London
DOI :
10.1049/ic:19990221
