NDLI: Performance and electromagnetic compatibility analysis of antennas for hand held mobile telephones

Content Provider	IEEE Xplore Digital Library
Author	Shtrikman, Ilan Lindenborn, Herbert Fruechting, Henning
Copyright Year	1996
Description	Author affiliation: RF-Techniques / Communication Systems, University of Kassel, 34121 Kassel, Germany. (Lindenborn, Herbert; Fruechting, Henning) \|\| RF-Techniques / Communication Systems, University of Kassel, 34121 Kassel, Germany. E-mail: shtrikma@hfk.e-technik.uni-kassel.de (Shtrikman, Ilan)
Abstract	The Finite Integration Algorithm (FIA) is used for the analysis of the Monopole and Radiation-Coupled Dual-L (RCDLA) antennas for personal communications at the GSM frequency of 900 MHz. The two aspects investigated are the electromagnetic-compatibility (EMC) and the performance. Special attention is given to a user wearing glasses, whereby the eddy currents in the frame induce electromagnetic fields in the eye area which is the very sensible area in the human head. It is found that 44% of the power delivered to the monopole is absorbed by the user, compared to only 20% for the RCDLA. The maximal local SAR (Specific Absorption Rate) inside the head for a transmitted power of 1 W for the monopole and RCDLA is 2 mW/cm3 and 0.9 mW/cm3 respectively. This is just reaching the German safety standard (2 mW/cm3 averaged over 10 g) for the monopole, but is less than half this standard for the RCDLA. It is also found that the RCDLA has a bandwidth of only 55 M.Hz, and that the user's hand has a strong influence on its resonant frequency. The monopole, on the other hand has a large bandwidth, and its impedance is not so sensitive to the presence of the user. For a user wearing glasses with a metalic frame, an increase of 2 dB in the local SAR in the area of the eye close to the phone is found compared to a user without glasses.
Starting Page	246
Ending Page	250
File Size	5838248
Page Count	5
File Format	PDF
DOI	10.1109/EUMA.1996.337564
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-09-06
Publisher Place	Czech Republic
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electromagnetic compatibility Electromagnetic analysis Performance analysis Mobile antennas Telephony Glass Specific absorption rate Bandwidth Algorithm design and analysis GSM
Content Type	Text
Resource Type	Article

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