Comparisons of SAR Values Measured between Fast and Full Measurement Procedures for Cellular Phones

The procedure for measuring the 10g averaged specific absorption rate (SAR) next to an ear is specified in the IEC standard document (IEC 62209-1). It generally consists of two parts: an initial area scan and a following zoom scan. However, the measurement based on IEC62209-1 takes considerably long time to determine the peak spatial average SAR. Therefore, IEC 62209-1 also provides the procedure for a fast SAR measurement instead of the full/ordinary SAR measurement as described above. In this study, to verify the validity of the procedure for the fast SAR measurement, we measured the peak spatial average SAR of some cellular phones by both the fast and full SAR measurement procedures. Then we compared peak SAR values between the fast and full SAR measurement procedures. Our results show that the fast-procedure SAR values almost matched with the full-procedure SAR values within the range of the uncertainty assumed for the SAR measurements. In addition, the measurement time of the fast SAR measurement procedure was evaluated and found to be reduced by around 30% compared with the measurement time for the full SAR measurement procedure.