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Author Rowley, J.T. ♦ Waterhouse, R.B.
Sponsorship IEEE Antennas and Propagation Society
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1963
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Microstrip antennas ♦ Patch antennas ♦ Telephone sets ♦ Bandwidth ♦ Finite difference methods ♦ Time domain analysis ♦ Specific absorption rate ♦ Mobile antennas ♦ Mobile communication ♦ Impedance
Abstract We have investigated the application of two different types of novel shorted-patch antennas for mobile communications handsets at 1800 MHz. A single shorted-patch and a stacked shorted-patch antenna offering improved bandwidth are compared with data for a /spl lambda//4 monopole. The finite-difference time-domain (FDTD) technique was used to calculate antenna characteristics such as impedance and radiation patterns for two cases: on a handset and on a handset near a (2.5-mm voxel) heterogeneous head model in an actual position of phone use. We also obtained specific absorption rate (SAR) distributions and calculated the spatial peak 1-g SAR values. In addition, the effect on SAR and antenna characteristics of including a block model of the hand was assessed. Similar performance is achieved from the single or stacked shorted-patch antenna with the latter providing greater bandwidth, 8.2% versus 9.4% with the head and hand included. Both antennas reduce the l-g spatial peak SAR value in the head by 70% relative to the monopole. The presence of the hand reduces the efficiency of all three antenna types by approximately 10%.
Description Author affiliation :: Telstra Res. Lab., Clayton, Vic., Australia
ISSN 0018926X
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1999-05-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 47
Issue Number 5
Size (in Bytes) 458.56 kB
Page Count 8
Starting Page 815
Ending Page 822


Source: IEEE Xplore Digital Library