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Effect of SAR on human head modeling inside cylindrical enclosures
T Anita Jones Mary1, C S Ravichandran
1Department of Electronics and Communication, Karunya University, Coimbatore 641114, Tamil Nadu, India. anitajones@karunya.edu
Electromagnetic Biology and Medicine
|January 18, 2013
Summary
Mobile phone radio frequency exposure is higher inside metallic enclosures. This study shows increased specific absorption rate (SAR) values for human exposure within cylindrical enclosures compared to free space.
Area of Science:
- Electromagnetics
- Human Exposure Analysis
- Computational Physics
Background:
- Metallic enclosures can alter electromagnetic fields due to resonance and reflection.
- Understanding radio frequency (RF) absorption is crucial for mobile device safety.
- Previous studies have not fully explored RF exposure within enclosed environments.
Purpose of the Study:
- To analyze the impact of cylindrical enclosures on human RF exposure.
- To compare specific absorption rate (SAR) values inside and outside enclosures.
- To investigate the effects of metallic enclosures on mobile phone radiation.
Main Methods:
- Utilized the Method of Moments (MoM) for computation.
- Simulated a mobile phone with an inverted-F antenna (IFA) in the Global System for Mobile Communication (GSM) band (900 MHz).
- Employed a human phantom with realistic dielectric properties within FEKO software.
Main Results:
- SAR values were significantly increased within cylindrical enclosures.
- Enclosure effects led to higher electromagnetic absorption compared to free space.
- The presence of the metallic enclosure amplified the electric field strength.
Conclusions:
- Cylindrical metallic enclosures enhance human exposure to RF radiation from mobile phones.
- Design considerations for devices used in enclosed spaces should account for increased SAR.
- Further research is needed to explore different enclosure geometries and frequencies.
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