A novel and effective technique to reduce electromagnetic radiation absorption on biotic components at 2.45 GHz

ABSTRACT

A strong evidence of the effects of radiation absorption on the living community together with a better solution to reduce the radiation intensity without compromising the usage of wireless communication systems is presented. This study analyses the radiation effects on living things and validates the proposed techniques for specific absorption rate (SAR) value reduction at 2.45 GHz. To reduce these radiation impacts on the living community, proper shielding from the radiation and effectively reorienting antenna radiation patterns are the solutions suggested. An analogous antenna configuration in wireless communication systems – a coplanar waveguide fed loop antenna is considered and an open loop resonator (OLR) optimized in ANSYS HFSS at 2.45 GHz is incorporated on the back side of the proposed antenna for achieving SAR value reduction. Theoretical and experimental validation is carried out by measuring the variation in absorption power on each vegetable sample using vector network analyzer E5080A. The existence of OLR on the back side of the antenna reduces the absorption power upto 2 dB. From experimental validation, the proposed technique provides 88% to 98% reduction in SAR value when tested in each sample. Along with this OLR exhibits the capability to enhance the shielding characteristics to the controlled environment of experimental setup for analyzing the stages of seed germination, which helps in reducing the reported radiation effects and growth retardation. The proposed method of EMR reduction with miniaturized planar resonator can be effectively used in the communication systems operating at 2.45 GHz for creating a reduced radiation environment.

KEYWORDS:

• Antenna
• electromagnetic radiation (EMR)
• open loop resonator (OLR)
• specific absorption rate (SAR)

Acknowledgments

We express our deep gratitude to our Chancellor and world renowned humanitarian leader Sri. (Dr.) Mata Amritanandamayi Devi (Amma) for her inspiration and support towards working on interdisciplinary research that has direct societal benefit. We are extremely thankful for all the support provided by Mauricio D. Perez, Microwaves in Medical Engineering Group, Solid State Electronics, Department of Electrical Engineering, Angstrom Laboratory, Uppsala University, Uppsala, Sweden for his valuable suggestions in experimental validations of this research work. We would also like to thank Bhuvana Nair S, Wireless Networks & Applications and Baby Sreeja, Department of Electronics & Communication Engineering of Amrita Vishwa Vidyapeetham for their immense support in carrying out the real time experiments.

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Declaration statement

There is no conflict of interest among authors.

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Funding

The author(s) reported there is no funding associated with the work featured in this article.