Simulation Analysis and Electromagnetic Dosimetry of Patch Antenna on Hugo Voxel Model
Keywords:Patch antenna, Off-body, On-body, Specific absorption rate (SAR),
AbstractThe off-body, on-body simulation analysis and electromagnetic dosimetry of a simple structure patch antenna operating in 2.45 GHz ISM band is presented. The antenna design is based on conventional structure with flexible substrate features and copper as the conductive plane. The simulation analysis was performed in CST Microwave Studio. Anatomic simulation using HUGO voxel model was used for on-body simulation and electromagnetic dosimetry. For off-body analysis, the antenna resonates at 2.45 GHz with S11 parameter of -32.56 dB and radiates unidirectionally with efficiency of 91.96 %. It was found that the presence of human lossy tissues and organs caused frequency detuning of 50.4-51.5 MHz and radiation efficiency degradation of 7.93 % to 13.78 %. The electromagnetic dosimetry on specific absorption rate (SAR) exposure of the antenna when it is mounted over averaged 10 g of tissues for chest, back, abdomen, arm and thigh was well below the IEEE Std. C95.3 limit. The maximum and minimum SAR was found when the antenna was placed on the back (0.332 W/kg) and arm (0.121 W/kg) respectively on the human body. Varying the distance from 0-20 mm of the antenna from the human body reduces the SAR exposure to the human body.
Abbasi, Q. H., Sani, A., Alomainy,A., and Hao, Y. “On-Body Radio Channel Characterization and System-Level Modeling for Multiband OFDM Ultra-Wideband Body-Centric Wireless Network,” IEEE Trans. Microwave Theory and Techniques, vol. 58, pp. 3485-3492,2010.
Lim, H. B., Baumann, D., and Li, E.-P. “A Human Body Model for Efficient Numerical Characterization of UWB Signal Propagation in Wireless Body area networks,” IEEE Transactions on Biomedical Engineering, vol. 8, pp. 689-697, 2011.
Gaetano, D., McEvoy, P., Ammann, M., Browne, J. E., Keating, L., and Horgan, F. “Footwear Antennas for Body Area Telemetry,” IEEE
Trans. Antennas Propag, vol. 61, pp. 4908-4916, 2013.
Soh, P. J., Van den Bergh, B., Xu, H., Aliakbarian, H., Farsi, S., Samal, P., Vandenbosch, G., Schreurs, D. M. M., Nauwelaers, B. K. J.
C. “A smart wearable textile array system for biomedical telemetry
applications,” IEEE Trans. Microwave Theory and Techniques, vol.61, pp. 2253-2261.
Khan, M. M., Rahman, M. A., Talha, M. A. and Mithila, T. “Wearable Antenna for Power Efficient On-Body and Off-Body Communications,” Journal of Electromagnetic Analysis and Applications, vol. 6, pp. 283-243, 2014.
Balanis, C. A. Antenna theory: analysis and design. 3rd edition. vol. 1. New Jersey, USA: John Wiley & Sons, 2005.
Kraus, J. D. and Marhefka, R. J. Antenna for all applications. 3rd edition. New York, USA: McGraw Hill, 2002.
Guha, D. and Antar, Y. M. 2011. Microstrip and printed antennas: new trends, techniques and applications. 1st edition. Noida, India: John Wiley & Sons, 2011.
Peratta, C. and Peratta, A. Modelling the human body exposure to ELF electric fields. Volume 47. United Kingdom: WIT Press, 2010.
Lin, J. C. Electromagnetic fields in biological systems. Hoboken: CRC press, 2011.
IEEE Std C95.3. IEEE Recommended Practice for Measurements and Computations of Radio Frequency Electromagnetic Fields With
Respect to Human Exposure to Such Fields 100 kHz-300 GHz, 2002.
Durney, C. H., Massoudi, H. and Iskander, M. F. Radiofrequency radiation dosimetry handbook. USA: Technical Report, 1986.
IEEE Std C95.1. 2005. IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields 3kHz to 300 GHz.
Ahlbom, A., Bergqvist, U., Bernhardt, J., Cesarini, J., Grandolfo, M.,
Hietanen, M. Mckinlay, A. F., Repacholi, M. H., Sliney, D. H. and Stolwijk, J. A. J. 1998. “Guidelines for limiting exposure to timevarying electric, magnetic, and electromagnetic fields (up to 300 GHz) ” Health Phys, vol. 74, pp. 494-522.
Alrawashdeh, R., Huang, Y.-P. and Cao, P. 2013. “Flexible meandered loop antenna for implants in MedRadio and ISM bands” Electronics Letters, vol. 49, pp. 1515-1517.
Cousin, R., Rütschlin, M., Wittig, T., and Bhattacharya, A. “Simulation of Wearable Antennas for Body Centric Wireless Communication” Sensing and Imaging, vol. 16, pp. 1-9, 2015.
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