Advanced Post-Processing Technique to Evaluate Specific Absorption Rate (SAR) for a Standard Dipole Antenna

With the progress of Radio communication technology, modern communication devices such as smart phones are packed with more and more frequency bands and different modulations covering 2G, 3G, 4G, 5G, WLAN, Bluetooth, Non terrestrial Network (NTN) and other use cases. Legacy techniques to evaluate the Specific absorption rate (SAR) take a lot of time, human resources and material costs. In this paper, advanced post-processing techniques are combined with near-field measurements to evaluate the SAR of a standard SAR dipole antenna. The results are then compared to measurements on a legacy SAR measurement system and with full wave simulations. The results show very good comparison with just 0.94 dB difference w.r.t reference measurements evaluated for the standard SAR dipole antenna operating at 2.45 GHz frequency. This study demonstrates that the proposed method to use near-field data along with advanced post-processing techniques is reliable and promising. The goal is to use this technique for evaluation of modern communication devices for pre-compliance SAR testing in a more efficient way as compared to using legacy SAR evaluation techniques, which are more time consuming, and require more human and material resources.