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2010-12-24
A New Low SAR Antenna Structure for Wireless Handset Applications
By
Progress In Electromagnetics Research, Vol. 112, 23-40, 2011
Abstract
This paper proposes a new mobile handset antenna structure to reduce the value of the specific absorption rate (SAR). The antenna is based on the PIFA structure and operates at dual-bands of 0.9 GHz and 1.8 GHz. The chassis current is reduced using a metallic shim-layer inserted between the patch and chassis. This shim-layer is connected to the handset chassis through posts whose number and positions are determined using optimization techniques. Sidewalls are attached to increase the gain of the antenna and reduce the radiation towards human head. Simulations in the cheek mode show that the SAR reduction factor (SRF) of the proposed structure averaged over 10-g is more than 75% at 0.9 GHz and 46% at 1.8 GHz. The SRF values obtained using simulations and measurements are found to be better than 51% and 76% at 0.9 GHz and 1.8 GHz, respectively.
Citation
Andi Hakim Kusuma Abdel-Fattah Sheta Ibrahim Elshafiey Zeeshan Siddiqui Majeed Alkanhal Saeed Aldosari Saleh A. Alshebeili Samir Mahmoud , "A New Low SAR Antenna Structure for Wireless Handset Applications," Progress In Electromagnetics Research, Vol. 112, 23-40, 2011.
doi:10.2528/PIER10101802
http://www.jpier.org/PIER/pier.php?paper=10101802
References

1. Christopoulou, M., S. Koulouridis and K. S. Nikita, "Parametric study of power absorption patterns induced in adult and child head models by small helical antennas," Progress In Electromagnetics Research, Vol. 94, 49-67, 2009.
doi:10.2528/PIER09031305

2. Hirata, A., K. Shirai, and O. Fujiwara, "On averaging mass of SAR correlating with temperature elevation due to a dipole antenna," Progress In Electromagnetics Research, Vol. 84, 221-237, 2008.
doi:10.2528/PIER08072704

3. Mahmoud, K. R., M. El-Adawy, S. M. M. Ibrahem, R. Bansal, and S. H. Zainud-Deen, "Investigating the interaction between a human head and a smart handset for 4G mobile communication systems," Progress In Electromagnetics Research C, Vol. 2, 169-188, 2008.
doi:10.2528/PIERC08032405

4. Kouveliotis, N. K. and C. N. Capsalis, "Prediction of the SAR level induced in a dielectric sphere by a thin wire dipole antenna," Progress In Electromagnetics Research, Vol. 80, 321-336, 2008.
doi:10.2528/PIER07112804

5. Ebrahimi-Ganjeh, M. A. and A. R. Attari, "Interaction of dual band helical and PIFA handset antennas with human head and hand ," Progress In Electromagnetics Research, Vol. 77, 225-242, 2007.
doi:10.2528/PIER07081804

6. IEEE Std C95.1-2005, "Safety levels with respect to human exposure to radio frequency electromagnetic fields, 3 kHz to 300 GHz," IEEE Standard, 2006.

7. ICNIRP Guidelines, "Guidelines for limiting exposure to time varying electric, magnetic and electromagnetic fields up to 300 GHz," Health Phys., Vol. 74, No. 4, 1998.

8. Lazzi, G., J. Johnson, S. S. Pattnaik, and O. P. Gandhi, "Experimental study on compact, high-gain, low SAR single- and dual-band patch antenna for cellular telephones," IEEE Antennas and Propagation Society International Symposium, Vol. 1, 130-133, 1998.

9. Park, J. D., B. C. Kim, and H. D. Choi, "A low SAR design of folder type handset with dual antennas," IEEE Antennas and Propagation Society International Symposium, Vol. 2, 1005-1008, 2003.

10. Cheng, P.-C., C.-Y.-D. Sim, and C.-H. Lee, "Multi-band printed internal monopole antenna for mobile handset applications," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 13, 1733-1744, 2009.
doi:10.1163/156939309789566978

11. Zuo, S. L., Z. Y. Zhang, and Y. Z. Yin, "A planar meander monopole antenna for DVB-H/GSM/DCS mobile handsets," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 17-18, 2331-2337, 2009.
doi:10.1163/156939309790416107

12. Kivekas, O., J. Ollikainen, T. Lehtiniemi, and P. Vainikainen, "Bandwidth, SAR, and efficiency of internal mobile phone antennas," IEEE Trans. Electromagn. Compat., Vol. 46, No. 1, 71-86, 2004.
doi:10.1109/TEMC.2004.823613

13. Saraereh, O. A., M. Jayawardene, P. McEvoy, and J. C. Vardax-oglou, "Simulation and experimental SAR and efficiency study for a dual-band PIFA handset antenna (GSM 900/DCS 1800) at var-ied distance from a phantom head," IEE Antenna Measurements and SAR, 5-8, 2004.
doi:10.1049/ic:20040066

14. Amos, S. V., M. S. Smith, and D. Kitchmer, "Modeling of handset antenna interactions with the user and SAR reduction techniques," IEE National Conference on Antennas and Propagation, 12-15, York, UK, 1999.

15. Kitra, M. I., C. J. Panagamuwa, P. McEvoy, J. C. Vardaxoglou, and J. R. James, "Low SAR ferrite handset antenna design," IEEE International Workshop on Antenna Technology Small Antennas and Novel Metamaterials, 144-147, 2006.
doi:10.1109/IWAT.2006.1608996

16. Kitra, M. I., C. J. Panagamuwa, P. McEvoy, J. C. Vardaxoglou, and J. R. James, "Low SAR ferrite handset antenna design," IEEE Trans. Antennas Propag., Vol. 55, No. 4, 1155-1164, 2007.
doi:10.1109/TAP.2007.893370

17. Wang, J., O. Fujiwara, and T. Takagi, "Effect of ferrite sheet attachment to portable telephone in reducing electromagnetic absorption in human head," IEEE International Symposium on Electromagnetic Compatibility, Vol. 2, 822-825, 1999.

18. Islam, M. T., M. R. I. Faruque, and N. Misran, "Design analysis of ferrite sheet attachment for SAR reduction in human head," Progress In Electromagnetic Research, Vol. 98, 191-205, 2009.
doi:10.2528/PIER09082902

19. Chou, H. H., H. T. Hsu, H. T. Chou, K. H. Liu, and F. Y. Kuo, "Reduction of peak SAR in human head for handset applications with resistive sheets (R-Cards)," Progress In Electromagnetic Research, Vol. 94, 281-296, 2009.
doi:10.2528/PIER09062702

20. Chan, K. H., L. C. Fung, S. W. Leung, and Y. M. Siu, "Effect of internal patch antenna ground plane on SAR," 17th International Zurich Symposium on Electromagnetic Compatibility, 513-516, 2006.
doi:10.1109/EMCZUR.2006.214984

21. SEMCAD. SEMCAD Manual, Available online at http://www.semcad.com..

22. DASY5 Documentation, manufactured by SPEAG, http://www.speag.com..

23. Kusuma, A. H., "Antenna design for mobile terminals based on interactions with the human body ," MS Thesis, King Saud University, Riyadh, Saudi Arabia, 2010.

24. Elshafiey, I., A.-F. Sheta, S. Aldosari, M. A. Alkanhal, and S. A. Alshebeili, "Multiobjective optimization for low SAR antenna design," IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), 213-218, 2009.
doi:10.1109/ISSPIT.2009.5407578

25. IEEE Std 1528-2003, "IEEE Recommended practice for determin-ing the peak spatial-average specific absorption rate (SAR) in the human head from wireless communications devices: Measurement techniques," IEEE Standard, 2003.

26. Du, Z., K. Gong, and J. S. Fu, "A novel compact wide-band planar antenna for mobile handsets," IEEE Trans. Antennas Propag., Vol. 54, No. 2, 613-619, 2006.
doi:10.1109/TAP.2005.863088

27. Ali, M., G. J. Hayes, H.-S. Hwang, and R. A. Sadler, "Design of a multiband internal antenna for third generation mobile phone handsets,", Vol. 51, No. 7, 1452-1461, 2003.
doi:10.1109/TAP.2003.812282