Title :
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
fDate :
5/1/2004 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.827513
