Regresar

User effect comparison between metal bezel antenna and planar inverted F-antenna for mobile terminal

Abstract:

This article presents a novel metal bezel antenna structure and its performance in user vicinity. The antenna is designed by keeping in mind the insensitivity in usage environments. In the antenna structure, a mobile chassis and a bezel are combined as one antenna element. Symmetrical feeding is used to excite the antenna. The characteristics of the metal bezel are compared with those of a conventional planar inverted-F antenna in terms of user effect at E-GSM band (880-960 MHz). Both antennas are measured and compared with four different hand phantom grips representing a browsing mode. The grips are designed so that the chassis is under the hand phantom in different variable usage conditions. Results are compared in terms of S11, total efficiency, total body loss, radiation efficiency, reflection loss, and in Smith chart presentation. Finally, antenna structures are compared with hand and head phantom measurements representing a calling mode. The comparison is done in terms of average total body loss. The used hand grips are the same as in the case of the hand phantom measurements. © 2012 Wiley Periodicals,v Inc. Microwave Opt Technol Lett 55:316-322, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27306 Copyright © 2012 Wiley Periodicals, Inc.