The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis)
Wearable metal objects with high electromagnetic reflection characteristics can cause interference with the incident waves during exposure to the electromagnetic (EM) radiation. Therefore, it is of interest to investigate the effect of metal objects capable of increasing the absorption of EM energy...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X20305311 |
| _version_ | 1818844555724718080 |
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| author | Deepshikha Bhargava Phadungsak Rattanadecho Teerapot Wessapan |
| author_facet | Deepshikha Bhargava Phadungsak Rattanadecho Teerapot Wessapan |
| author_sort | Deepshikha Bhargava |
| collection | DOAJ |
| description | Wearable metal objects with high electromagnetic reflection characteristics can cause interference with the incident waves during exposure to the electromagnetic (EM) radiation. Therefore, it is of interest to investigate the effect of metal objects capable of increasing the absorption of EM energy and temperature within the tissues when get exposed to EM radiation. A numerical analysis of increase in specific absorption rate (SAR) and temperature distribution in a human head model when metal objects are placed between the head and radiating source is performed. A realistic three-dimensional heterogeneous human head model, metal objects of different shapes and sizes, and spectacles with different lenses are used. A half-wavelength dipole antenna operating at 1800 MHz served as an EM radiation source. Results show that the presence of metal objects in proximity to the head alters SAR and temperature increase within the tissues. In most cases, metal objects redistribute the EM field incident upon them to a smaller region increasing power absorption, thereby increasing SAR and temperature in that region. The power absorption in head layers is found to be sensitive to metal object's size and shape, and distance of the antenna from the objects. |
| first_indexed | 2024-12-19T05:15:38Z |
| format | Article |
| id | doaj.art-0d60b8bc926141e4a7aa4278cafc0b44 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-19T05:15:38Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-0d60b8bc926141e4a7aa4278cafc0b442022-12-21T20:34:40ZengElsevierCase Studies in Thermal Engineering2214-157X2020-12-0122100789The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis)Deepshikha Bhargava0Phadungsak Rattanadecho1Teerapot Wessapan2Center of Excellence in Electromagnetic Energy Utilization in Engineering (CEEE), Department of Mechanical Engineering, Faculty of Engineering, Thammasat University (Rangsit Campus), 99 Moo 18, Klong Luang, Pathum Thani, 12120, ThailandCenter of Excellence in Electromagnetic Energy Utilization in Engineering (CEEE), Department of Mechanical Engineering, Faculty of Engineering, Thammasat University (Rangsit Campus), 99 Moo 18, Klong Luang, Pathum Thani, 12120, Thailand; Corresponding author.Department of Mechanical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, 39 Moo 1, Rangsit-Nakhonnayok Rd. (Klong6), Pathum Thani, 12110, ThailandWearable metal objects with high electromagnetic reflection characteristics can cause interference with the incident waves during exposure to the electromagnetic (EM) radiation. Therefore, it is of interest to investigate the effect of metal objects capable of increasing the absorption of EM energy and temperature within the tissues when get exposed to EM radiation. A numerical analysis of increase in specific absorption rate (SAR) and temperature distribution in a human head model when metal objects are placed between the head and radiating source is performed. A realistic three-dimensional heterogeneous human head model, metal objects of different shapes and sizes, and spectacles with different lenses are used. A half-wavelength dipole antenna operating at 1800 MHz served as an EM radiation source. Results show that the presence of metal objects in proximity to the head alters SAR and temperature increase within the tissues. In most cases, metal objects redistribute the EM field incident upon them to a smaller region increasing power absorption, thereby increasing SAR and temperature in that region. The power absorption in head layers is found to be sensitive to metal object's size and shape, and distance of the antenna from the objects.http://www.sciencedirect.com/science/article/pii/S2214157X20305311Electromagnetic wavesSARTemperatureDipole antennaMetal object |
| spellingShingle | Deepshikha Bhargava Phadungsak Rattanadecho Teerapot Wessapan The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis) Case Studies in Thermal Engineering Electromagnetic waves SAR Temperature Dipole antenna Metal object |
| title | The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis) |
| title_full | The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis) |
| title_fullStr | The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis) |
| title_full_unstemmed | The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis) |
| title_short | The effect of metal objects on the SAR and temperature increase in the human head exposed to dipole antenna (numerical analysis) |
| title_sort | effect of metal objects on the sar and temperature increase in the human head exposed to dipole antenna numerical analysis |
| topic | Electromagnetic waves SAR Temperature Dipole antenna Metal object |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X20305311 |
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