In recent years, mobile phone technology has wit-nessed substantial growth. The mobile phone radiates electro-magnetic waves at around 900MHz, 1800MHz and or 2100MHz. Mobile phone radiation interact with biological tissues, creating adverse health effects. It demands methods for reducing radiation. This paper proposes different shields made of aluminum, copper, nickel, silver, zinc, ferrite with different dimensions. Dipole antenna was designed to operate at 900MHz frequency, and two-layer spherical shell was designed to represent human head phantom. On this, designed shields were included and analyzed using computational software. SAR averaged over 10gram and 1gram of tissue was obtained. Results were compared and percentage SAR reduction of each shield was calculated.
[1]
B.S. Yildirim,et al.
Analysis of a magnetically-shielded cellular phone antenna using finite-difference time-domain method
,
1996,
1996 IEEE MTT-S International Microwave Symposium Digest.
[2]
Minseok Jung,et al.
Evaluation of SAR reduction for mobile communication handsets
,
2002,
IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313).
[3]
L. K. Ragha,et al.
Evaluation of SAR Reduction for Mobile Phones Using RF Shields
,
2010
.
[4]
Hsi-Tseng Chou,et al.
Reduction of peak sar in human head for handset applications with resistive sheets (R-cards)
,
2009
.