Mesh-Type Split-Ring Resonator as Parasitic Radiator for SAR Reduction in Mobile Handset

Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 308)


The cellular personal communications system has marked a phenomenal and intensive development and its cons have been observed lately. A lot of work has not been dispensed to minimise the hazardous effects. Thus, the protection toward a person’s head and safeguarding from the radiations of non-ionizing electromagnetic signals produced by cellular phones while in use is fetching one of the most concerned tasks to neutralize to an infinitesimally small amount. Since planar inverted-F antenna (PIFA) is a very favoured design in mobile applications, it is of prime importance to analyze the matching properties of such an antenna in real application scenarios (i.e., in close proximity to the head, grasped by the hand). Any matching deviation leads to the reduction of radiated power which should be accounted for in the system design. Different specifications of the proposed antenna are measured through simulations in free space as well as in the presence of the human head model. Specific absorption rate (SAR) is also computed for this antenna, and the interaction of the antenna with the human body is also investigated. The results of elaborated antenna design that have minimized radiation toward the user’s head are presented in this paper.


Cellular personal communication Non-ionizing Electromagnetic signals PIFA Radiated power SAR 



I would like to thank Mrs. Lizina Khatua, Assistant Professor, KIIT University, and Mr. Asit Panda, Assistant Professor, NIST, Berhampur, for his support during all antenna simulations in CST Microwave Studio.


  1. 1.
    ICNIRP (International Commission on Non-Ionizing Radiation): Guidelines for limiting exposure to time varying electric, magnetic and electromagnetic fields (up to 300 GHz). Health Phys. 74(494–522), 1998 (1988)Google Scholar
  2. 2.
    IEEE, C95.1 IEEE standard for safety levels with respect to human exposure to radio frequency electromagnetic fields, 3 KHz to 300 GHz, IEEE, New York (2005)Google Scholar
  3. 3.
    Wang, J.Q., Fujiwara, O.: Comparison and evaluation of electromagnetic absorption characteristics in realistic human head models of adults and children for 900 MHz mobile telephones. IEEE Trans. Microwave Theor. Tech. 51(3), 966–971 (2003)CrossRefGoogle Scholar
  4. 4.
    Popovi´c, M., Han, Q., Kanj, H.: A parallel study of SAR levels in head tissues for three antennas used in cellular telephones: monopole, helix and patch. Springer Earth Environ. Sci. 25(4), 215–221 (2005)Google Scholar
  5. 5.
    Gandhi, O.P., Kang, G.: Some present problems and a proposed experimental phantom for SAR compliance testing of cellular telephones at 835 MHz and 1900 MHz. Phys. Med. Biol. 47, 1501–1518 (2002)CrossRefGoogle Scholar
  6. 6.
    CST STUDIO SUITETM 2006 MWS (Microwave Studio) manualGoogle Scholar

Copyright information

© Springer India 2015

Authors and Affiliations

  1. 1.School of Electronics EngineeringKIIT UniversityBhubaneswarIndia

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