Dependence on antenna output power of temperature rise in human head for portable telephones

Author

Wang, Jianqing ; Joukou, Takahiro ; Fujiwara, Osarnu

Author_Institution

Dept. of Electr. & Comput. Eng., Nagoya Inst. of Technol., Japan

Volume

2

fYear

1999

fDate

11/1/1999 12:00:00 AM

Firstpage

481

Abstract

Since biological hazards due to RF exposure are caused mainly by a temperature rise in tissue, the localized specific absorption rate (SAR) should be related to the temperature rise in the human head for portable telephones. Although the SAR is known to be directly proportional to the antenna output power of portable telephones, the dependence of temperature rise on the antenna output power remains unclear. In this paper, the relationship between the peak temperature rise in a human head and the antenna output power is investigated by using the finite-difference time-domain (FDTD) method. It is found that the peak temperature rise is approximately proportional to the antenna output power below 1 W and also that the peak temperature rise in the brain can be estimated from its blood-flow and heating potential

Keywords

UHF antennas; biological effects of microwaves; brain; cellular radio; finite difference time-domain analysis; haemodynamics; health hazards; hyperthermia; 1 W; 1.5 GHz; 900 MHz; RF exposure; SAR; antenna output power; biological hazards; blood-flow; brain; finite-difference time-domain method; heating potential; human head; localized specific absorption rate; portable telephones; temperature rise; tissue; Biohazards; Biological tissues; Finite difference methods; Humans; Power generation; Radio frequency; Specific absorption rate; Telephony; Temperature dependence; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1999 Asia Pacific

Print_ISBN

0-7803-5761-2

Type

conf

DOI

10.1109/APMC.1999.829913

Filename

829913