Journal of Radiation Research and Radiation Processing, Volume. 42, Issue 5, 050601(2024)
Safety assessment of electromagnetic exposure from a 13.56 MHz RF anti-theft device
Figures & Tables(17)
Fig. 1. RF anti-theft device model: (a) side view of anti-theft door panel; (b) front view of anti-theft door panel;
Fig. 4. Validity verification results: (a) parallel X-axis magnetic field intensity distribution; (b) parallel Y-axis magnetic field intensity distribution (color online)
Fig. 6. Simulation diagrams of exposure scenarios in different standing positions: (a) right in the middle; (b) right in front of the center 25 cm
Fig. 7. Distribution of human electric field intensity and magnetic field intensity at 100 mW: (a) electric field intensity at position A; (b) magnetic field intensity at position A; (c) electric field intensity at position B; (d) magnetic field intensity at position B
Fig. 8. Human SAR value distribution at 100 mW: (a) SAR value of specific absorptivity at position A; (b) SAR value of specific absorptivity at position B
Fig. 9. Human head SAR value distribution at position A at 100 mW: (a) scalp; (b) skull; (c) brain; (d) head section
Fig. 10. Human head SAR value distribution at position B at 100 mW: (a) scalp, (b) skull, (c) brain, (d) head section
Fig. 11. Distribution of human electric field intensity and magnetic field intensity at 1 W: (a) electric field intensity at position A; (b) magnetic field intensity at position A; (c) electric field intensity at position B; (d) magnetic field intensity at position B
Fig. 12. Human SAR value distribution at 1 W: (a) position A ratio of absorptivity SAR; (b) position B ratio of absorptivity SAR
Fig. 13. Human head SAR value distribution at position A at 1 W: (a) Scalp; (b) Skull; (c) Brain; (d) Head section
Fig. 14. Human head SAR value distribution at position B at 1 W: (a) scalp; (b) skull; (c) brain; (d) head section
Table 1. Public electromagnetic exposure limits of 13.56 MHz time-varying electromagnetic fields
View tableView in ArticleTable 1. Public electromagnetic exposure limits of 13.56 MHz time-varying electromagnetic fields
组织
Tissue
相对介电常数
Relative permittivity
电导率 /（S·m-1）
Conductivity
人体组织密度 / (kg·kg-3)
Human tissue density
头皮 Scalp 285.250 0.238 1 100 颅骨 Skull 30.575 0.046 1 850 大脑 Brain 174.920 0.836 1 030 躯干 Body 97.871 0.558 1 263
Table 2. Comparison of E, H, SAR and ICNIRP limits of tissues in position A of the human body
View tableView in ArticleTable 2. Comparison of E, H, SAR and ICNIRP limits of tissues in position A of the human body
功率
Power
头皮
Scalp
颅骨
Skull
大脑
Brain
躯干
Body
ICNIRP限值
ICNIRP limit
100 mW 4.9×10-3 V/m 0.01 V/m 1.01×10-3 V/m 0.26 V/m 108.18 V/m 3.18×10-4 A/m 3.03×10-4 A/m 2.94×10-4 A/m 0.05 A/m 0.36 A/m 2.68×10-9 W/kg 1.28×10-9 W/kg 4.14×10-10 W/kg 1.55×10-5 W/kg 2 W/kg 1 W 0.01 V/m 0.02 V/m 3.77×10-3 V/m 0.84 V/m 108.18 V/m 1.01×10-3 A/m 9.65×10-4 A/m 9.36×10-4 A/m 0.16 A/m 0.36 A/m 2.04×10-8 W/kg 8.81×10-9 W/kg 5.73×10-9 W/kg 1.5×10-4 W/kg 2 W/kg
Table 3. Comparison of E, H, SAR and ICNIRP limits of tissues in position B
View tableView in ArticleTable 3. Comparison of E, H, SAR and ICNIRP limits of tissues in position B
功率
Power
头皮
Scalp
颅骨
Skull
大脑
Brain
躯干
Body
ICNIRP限值
ICNIRP limit
100 mW 0.03 V/m 0.07 V/m 5.73×10-3 V/m 0.1 V/m 108.18 V/m 3.9×10-4 A/m 3.75×10-4 A/m 3.74×10-4 A/m 2.08×10-3 A/m 0.36 A/m 8.88×10-8 W/kg 5.85×10-8 W/kg 1.33×10-8 W/kg 2.29×10-6 W/kg 2 W/kg 1 W 0.07 V/m 0.1 V/m 0.02 V/m 0.36 V/m 108.18 V/m 1.23×10-3 A/m 1.2×10-3 A/m 1.2×10-3 A/m 6.56×10-3 A/m 0.36 A/m 5.08×10-7 W/kg 3.02×10-7 W/kg 1.67×10-7 W/kg 2.92×10-5 W/kg 2 W/kg
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Zhongyi YANG, Mai LU. Safety assessment of electromagnetic exposure from a 13.56 MHz RF anti-theft device[J]. Journal of Radiation Research and Radiation Processing, 2024, 42(5): 050601
Paper Information
Category: RADIATION PROTECTION
Received: Apr. 1, 2024
Accepted: May. 10, 2024
Published Online: Jan. 2, 2025
The Author Email: LU Mai (逯迈)
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