CAD mobile phone model calibration using experimental specific absorption rate data

International measurement standards have been elaborated to assess the specific absorption rate (SAR) compliance of mobile phones. The procedure to evaluate SAR pre-compliance of mobile phones using numerical modeling tools based on the finite difference time domain (FDTD) method is currently being developed by the international standardization committee of IEC/IEEE 62704-3. The uncertainty quantification of the SAR calculation using a computer-aided design (CAD) mobile phone model is a challenging task, yet to be fully addressed. Herein a procedure to quantify the model or structural uncertainty is proposed. It is based on the calibration of the CAD mobile phone model by experimental SAR data obtained using a flat phantom filled with the appropriate tissue equivalent liquid. The procedure is applied to two commercially available mobile phone models.