Investigating the impact of smart antennas on SAR

Author

Chim, Kwok-Chi ; Chan, Kenneth C L ; Murch, Ross D.

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China

Volume

52

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

1370

Lastpage

1374

Abstract

We investigate the impact of smart antennas on specific absorption rates (SAR) at 1.9 GHz. We emulate the operation of the smart antennas by utilizing a mobile telephone prototype configured with two PIFA antennas and applying carriers with different signal phases to them. The SAR of this prototype is simulated using FDTD and is also experimentally determined using a MapSAR system. It is found that the operation of smart antennas on SAR has a significant impact, with SAR changing by over 50% for various signal phases. This leads to the conclusion that if smart antennas are to be utilized in handsets careful investigation of their impact on SAR is needed.

Keywords

UHF antennas; adaptive antenna arrays; electromagnetic wave absorption; finite difference time-domain analysis; health hazards; mobile antennas; mobile handsets; 1.9 GHz; FDTD; MapSAR system; PIFA antenna; finite difference time-domain analysis; mobile telephone prototype; planar inverted F-antennas; smart antenna; specific absorption rate; Antenna feeds; Antennas and propagation; Humans; Mobile antennas; Prototypes; Specific absorption rate; Telephone sets; Telephony; Transmitting antennas; Wireless communication; PIFA; SAR; Specific absorption rate; mobile telephone antenna; planar inverted F antennas; smart antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2004.827513

Filename

1296850