SPECIFIC ABSORPTION RATE (SAR) DUE TO VARIATION IN FREQUENCY ON HUMAN BODY TISSUES NEAR RADIO BROADCASTING ANTENNA
Objective: Theoretical studies are made for the specific absorption rate (SAR) in consequences of induced electric fields due to radio broadcasting
tower at 100 m distance.
Methods: The penetrated electric fields and SAR inside human body tissues are calculated for different frequencies. A comparison is made with the
international safety guidelines given by World Health Organization and International Commission on Non-ionizing Radiation Protection.
Results: The penetrated electric field and SAR by some tissues at frequencies 1377, 1404, 1485, 1512, and 1530 kHz of electromagnetic waves are
Conclusion: According to permissible limit the frequencies 1377, 1404, 1485, 1512 and 1530 kHz of 20 kW EM radiations at 100 m distance are safe
for tissues bladder, blood vessel, brain white matter, fat, heart, lung outer and mucous membrane at depths 0.1, 0.2 and 0.3 mm respectively. And this
radiation is harmful for blood, body fluid, cerebella spinal fluid, eye sclera, gall bladder, gall bladder bile, gland, lung inner, lymph, mucous membrane,
pancreas, stomach, testis and vitreous humor tissues at depths 0.1, 0.2 and 0.3 mm, respectively.
Keywords: Induced electric field, Specific absorption rate, Thermoregulatory mechanism and broadcasting antenna.
1. Brodsky LM, Habash RWY, Leiss WL, Krewski D and Repacholi M. Electromagnetic fields and possible health risk. Part iii: Risk analysis,â€ Crit. Rev. Biomed. Eng., 2003; 31: 333-354.
2. WHO. WHO Hand book on establishing a dialogue on risk from electromagnetic fields. World Health Organization, Geneva ; 2002.
3. Frey AH. Evolution and results of biological research with low-intensity non-ionizing radiation. Modern Bioelectricity, New York: Marcel Dekker, 1988 ; 788â€“837.
4. Vander Vorst AV. Radio Frequency/microwave radiation protection. TUTB Newslett, 2003 ; 21 : 12â€“15.
5. Hurt WD. Multiterm Debye dispersion relations for permittivity of muscle. IEEE Trans. Biomed. Eng., 1985 ; 32 : 50â€“54.
6. Robert P. Electrical and Magnetic Properties of Materials. Norwood, MA: Artech House, 1988.
7. Hu C, Barnes JFS, A simplified theory of pearl chain effects. Radiat. Environ. Biophys., 1975 ; 12: 71â€“75.
8. Sher LD, Kresch E, Schwan HP. On the possibility of non-thermal biological effects of pulsed electromagnetic radiation. Biophysics J., 10: 970â€“979.
9. Foster KR. Electromagnetic field effects and mechanisms. IEEE Eng. Med. Biol., 1995; 15: 50â€“55.
10. King RWP. The interaction of power line electromagnetic fields with the human body. IEEE Eng Med Biol., 1998; 17: 57â€“78.
11. Magnussen T. Electromagnetic Fields. New York: EMX Corporation, 1999.
12. Wertheimer N, Leeper E. Electrical wiring configurations and childhood cancer. Amer. J. Epidemiol., 1979 ; 109 : 273â€“284.
13. ICNIRP. Guidelines for limiting exposure to time-varying electric and magnetic fields (1 Hzâ€“100 kHz). Health Phys., 2010; 99:818â€“836.
14. Burch JB, Clark M, Yost M G, Fitzpatrick CTE, Bachand AM, Ramaprasad J, Rei JS,. Radio frequency non-ionizing radiation in a community exposed to radio and television broadcasting. Environ. Health Perespec., 2006 ; 114 : 248â€“253.
15. Hocking B, Gordon I, Grain H, Hatfield G. Cancer incidence and mortality and proximity to TV towers. Med. J. Aust., 1996 ; 65: 601â€“605.
16. McKenzie DR, Yin Y, Morrell S. Childhood incidence of acute lymphoblastic leukemia and exposure to broadcast radiation in Sydneyâ€”a second look. Aust NZ J Pub Health, 1998 ; 22 : 360â€“367.
17. Michelozzi P, Ancona C, Fusco D, Forastiere F, Perucci C A. Risk of leukemia and residence near a radio transmitter in Italy. Epidemiology, 1998; 9, pp. 354.
18. Michelozzi P, Ancona C, Kirchmayer U, Forastiere F, Biggeri A, Barca A, Perucci CA. Adult and childhood leukemia near a high-power radio station in Rome, Italy. Am J Epidemiol., 2002; 155 : 1096â€“1103.
19. Adair ER, Mylacraine KS, Allen SJ. Thermophysiological consequences of whole body resonant RF exposure (100 MHz) in human volunteers. Bioelectromagnetics, 2003; 24: 489â€“501.
20. Adair ER, Black DR. Thermoregulatory responses to RF energy absorption. Bioelectromagnetics, 2003 ; 24: S17â€“S38.
21. Prasad KD. Electromagnetic Waves, In: Electromagnetic Fields and Waves, Ist. ed., India: Satya Prakashan, 1999 ; pp. 425-520.
22. Stuchly MA, Stuchly SS. Experimental radio and microwave dosimetry in C. Polk and E. Postow (Eds.), Handbook of Biological Effects of Electromagnetic Fields, Boca Raton, FL: CRC Press, 1996.
23. Application prepared by Daniele Andreuccetti, Roberto Fossi and Caterina Petrucci, based on the parametric model for the calculation of the dielectric properties of body tissues developed by C.Gabriel and collegues at the Brooks Air Force Base, U.S.A. IFAC-CNR, Florence (Italy), 1997-2007.
24. Roje V. Write Antenna theory applied to the assessment of the radiation hazard in the vicinity of the GSM Base Station. Serbian journal of electrical engineering, 2003; 1: 15-26.
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