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Analysis of Coupling Effects between Human Head and Cellular Phone Antennas

Lalit Kumar Jha, S.N. Singh, Pramod Jha, Neeraj Kumar. Published in Wireless

International Journal of Applied Information Systems
Year of Publication: 2015
Publisher: Foundation of Computer Science (FCS), NY, USA
Authors: Lalit Kumar Jha, S.N. Singh, Pramod Jha, Neeraj Kumar
10.5120/ijais2015451468
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  1. Lalit Kumar Jha, S N Singh, Pramod Jha and Neeraj Kumar. Article: Analysis of Coupling Effects between Human Head and Cellular Phone Antennas. International Journal of Applied Information Systems 10(2):15-18, December 2015. BibTeX

    @article{key:article,
    	author = "Lalit Kumar Jha and S.N. Singh and Pramod Jha and Neeraj Kumar",
    	title = "Article: Analysis of Coupling Effects between Human Head and Cellular Phone Antennas",
    	journal = "International Journal of Applied Information Systems",
    	year = 2015,
    	volume = 10,
    	number = 2,
    	pages = "15-18",
    	month = "December",
    	note = "Published by Foundation of Computer Science (FCS), NY, USA"
    }
    

Abstract

This paper presents the synthesis and analysis of a helical antenna for cellular phone. Its coupling effect on human brain has also been investigated in detail. Antenna characteristics parameters such as reflection coefficient, directivity, gain, axial ratio has been observed in presence of SAM human brain phantom. First of all, antenna dimensions has been calculated using MATLAB Program. Further, CST Studio Suite has been used to model and simulate the mobile device in presence of a SAM human head phantom. The signal Absorption Ratio value for the modeled system, and its comparison with the limiting value given by different regulatory authorities present across the globe has been done. On simulating the model, reflection coefficient of the antenna is found to be -37.42 at the operating frequency of 900 MHz Directivity of the circularly polarized antenna is 3.69dBi and SAR value is 0.889 W/kg and 0.597 W/kg averaged for 1g and 10g of tissue respectively.

Reference

  1. J. T. Rowley, R. B. Waterhouse, and K. H. Joyner, “Modeling of normal-mode helical antennas at 900 GHz and 1.8 GHz for mobile communications handsets using FDTD technique,” IEEE Trans. Antennas Propagation, vol. 50, pp. 812-819, June 2002.
  2. P. Bernardi, M. Cavagnaro, S. Pisa, and E. Piuzzi, “Power absorption and temperature elevations induced in the human head by a dual-band monopole-helix antenna phone,” IEEE Trans. Microwave Theory Tech., vol. 49, pp. 2539-2546, Dec., 2001.
  3. M. A. Mangoud, R. A. Abd-Alhameed, and P. S. Excell, “Simulations of human interactions with mobile telephones using hybrid techniques over coupled domains,: IEEE Trans. Antenna Propagation, vol. 48, pp. 2014-2021, Nov. 2000.
  4. K. S. Nikita e.t el., “A study of uncertainties in modeling antenna performance and power absorption in the head of a cellular phone user,” IEEE Trans Microwave Theory. Tech., vol. 49, pp. 2676-2687, Dec. 2000.
  5. K. S. Nikita, G. S. Stamatakos, N. K. Uzunoglu, and A. Karafotias, “Analysis of the interaction between a layered spherical human head model and a finite length dipole,” IEEE Trans. Microwave Theory Tech., vol. 48., pp. 2003-2013, Nov., 2000.

Keywords

Helical Antenna, Coupling Effect, Human Brain, Signal Absorption Ratio, Reflection Coefficient, Directivity, Circular Polarization