A SAR test procedure for wireless devices with simultaneous multi-band transmission

Siegbahn, M.; Törnevik, Christer

doi:10.1109/aps.2003.1219411

Cited by 3 publications

(1 citation statement)

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“…Given that the tissue simulating liquid and the probe calibration are frequency dependent, and given that existing SAR measurement systems are unable to separate the frequency components of a signal, it is not possible to accurately measure the SAR from such a transmitter using one measurement in one liquid. It has been proposed instead that separate SAR measurements (area and zoom scans) are done at each frequency (using the appropriate tissue simulating liquid and probe calibration at that frequency) and the SAR distributions are added [16]. This method makes sense, but it may be very time consuming to implement, especially if the SAR peaks of the multiple transmitters are far apart due to the need to measure zoom scans that covers all peaks.…”

Section: Discussionmentioning

confidence: 97%

Faster Determination of Mass-Averaged SAR From 2-D Area Scans

Kanda

Douglas

Mendivil

et al. 2004

IEEE Trans. Microwave Theory Techn.

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An algorithm is presented that accurately and quickly estimates the peak 1-or 10-g averaged specific absorption rate (SAR) in a human phantom when exposed to a wireless device. Instead of performing both an area scan and a zoom scan (as per international standards), only the area scan and knowledge of the transmit frequency are needed. The accuracy of the algorithm has been demonstrated across a broad frequency range (150-2450 MHz) and for both 1-and 10-g averaged SAR using a sample of 264 SAR measurements from 55 wireless handsets. For the sample size studied, the root-mean-squared errors of the algorithm are 1.2% and 5.8% for 1-and 10-g averaged SAR, respectively. It is shown that the algorithm works well in both head and body phantoms.

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Section: Discussionmentioning

confidence: 97%