Experimental results of radio-frequency radiation measurements from cellular telephones

Measurement results of radio-frequency field strength from cellular telephones are reported. Transportable and hand-held portable sets were used for the study, and their radiation levels were compared with the International Radiation Protection Agency (IRPA) and UK exposure standards as a function of distance for two operational environments. The hand-held portable set, which uses very low-power transmissions, was found to have radiation levels well within the prescribed limits. For the transportable radiophone, exposure levels are within limits for the UK standards, but are violated at certain points close to the antenna for IRPA standards. However, the position of the antenna in such telephones is well away from the user under normal operating conditions, where the radiation levels are well within limits.