This analysis report details the evaluation of a 2.4GHz transceiver (controller unit) for an RC car to determine its compliance with Specific Absorption Rate (SAR) exclusion thresholds. The device operates on 33 channels within the 2420-2465MHz range and is powered by two 1.5V AAA batteries. The report considers the antenna type (internal integral antenna) and gain (0dBi), along with the nominal rated field strength of 80.9dBμV/m at 3m and a production tolerance of +/- 3dB.
The assessment is based on the KDB 447498 D04 Interim General RF Exposure Guidance v01 and KDB 412172 D01. The maximum allowed average field strength of production tolerance is calculated to be 83.9dBμV/m at 3m. The report then calculates the field strength according to minimum SAR exclusion threshold levels, considering the ERP and distance parameters. The analysis concludes that the maximum conducted power and field strength are well below the SAR exclusion threshold level, indicating that the EUT complies with SAR requirements without the need for further testing.