A Novel Cellular Handset Design for an Enhanced Antenna Performance and a Reduced SAR in the Human Head
This paper presents a novel cellular handset design with a bottom-mounted short loaded-whip antenna. This new handset design is modeled and simulated using a finite difference time-domain (FDTD)-based platform SEMCAD. The proposed handset is based on a current commercially available bar-phone ty...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2008-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2008/642572 |
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| Summary: | This paper presents a novel cellular handset design with a bottom-mounted
short loaded-whip antenna. This new handset design is modeled and simulated
using a finite difference time-domain (FDTD)-based platform
SEMCAD. The proposed handset is based on a current commercially
available bar-phone type with a curvature shape, keypad positioned above the
screen, and top-mounted antenna. The specific absorption rates (SARs) are
determined computationally in the specific anthropomorphic mannequin
(SAM) and anatomically correct model of a human head when exposed
to the EM-field radiation of the proposed cellular handset and the handset
with top-mounted antenna. The two cellular handsets are simulated to operate at
both GSM standards, 900 MHz as well as 1800 MHz, having different
antenna dimensions and intput power of 0.6 W and 0.125 W,
respectively. The proposed human hand holding the two handset models is
a semirealistic hand model consists of three tissues: skin, muscle, and bone.
The simulations are conducted with handset positions based on the IEEE
standard 1528-2003. The results show that the proposed handset has a
significant improvement of antenna efficiency when it is hand-held close to head,
as compared with the handset of top-mounted antenna. Also, the results show that
a significant reduction of the induced SAR in the human head-tissues can be
achieved with the proposed handset. |
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| ISSN: | 1687-5869 1687-5877 |