Reducing irradiation human head by cellular phone antenna
DOI:
https://doi.org/10.20535/RADAP.2014.59.58-65Keywords:
compensation method, mutual coupling, cellular phone antenna, dark spot, electromagnetic fieldsAbstract
Introduction. The paper proposed a method of reducing irradiation human head by cellular phone antenna. A method of solving this problem, called the compensation method. In this method, an additional radiator is placed between the head and handset (main) radiator.The results. In this work were found the electromagnetic fields. Also we solved system of linier equation and calculated the currents of radiators. We found the boundary surface of the dark spot.
Conclusion. We have described the characteristics of the compensation method for the creation of weak-field area in the near region of transmitting antenna. The dimensions of the weak-field area were determined, And the mutual coupling between the main and auxiliary antennas was analyzed. The results obtained showed that under realistic condition, the compensation method permits decreasing the irradiation power by a factor of 4 to 50. Methods of wideband field compensation will be separately considered.
References
Chen H. Y. and Yang H. (2004) SAR affected by shapes and electrical properties of the human head exposed to the cellular phone. Microwave and Optical Technology Letters, Vol. 42, No. 1, p. 1-4.
Yoshida K. A., Hirata A., Kawasaki Z. and Shiozawa T. (2005) Human head modeling for modeling for handset antenna design at 5 GHz band. Journal of Electromagnetic Waves and Applications, Vol. 19, No. 3, p. 401-411.
Mahmoud K. R., El-Adawy M., Ibrahem S. M. M., Bansal R. and Zainud-Deen S. H. (2008) Investigation the interaction between a human head and smart handset for 4 GHz communication systems. Progress in Electromagnetics Research, Vol. 2, p.169-188.
Bank M. and Levin B. (2007) The development oh the Cellular Phone Antenna with a Small Radiation of Human Organism Tissues. IEEE Antenna Propagation Magazine, Vol. 49, No. 4, pp. 65-73.
Levin B., Haridim M. and Bank M. (2013) Cellular phone Antenna with a Small Irradiation of the Human Head. IEEE Antennas and Propagation Magazine. Vol. 55. No. 4, p.110–125.
Balanis C. A. (1997) Antenna Theory: Analysis and Design, New York, Wiley and Sons.
Potekhin A. I. (1948) Nekotorye zadachi difraktsii elektromagnitnykh voln [Some problem of electromagnetic waves diffraction]. Moskow, Sovetskoe radio Publ., 136 p..
Vatson G.N. and Berman V. S. eds. (1949) Teoriya Besselevskikh funktsii, chast' 1 [The theory of Bessel functions, part 1]. Moskow, Inostrannaya literatura Publ., pp. 798.
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