Near-field equivalent source representation for SAR estimation

摘要

Efficient techniques for estimating specific absorption rate (SAR) for wireless devices. In an aspect, electric and/or magnetic field measurements are made over a two-dimensional (2D) surface in the proximity of a wireless device. The field measurements are used to generate a near-field equivalent source representation of the wireless device. Specific absorption rate over, e.g., a 1 g/10 g mass may then be calculated by performing electromagnetic simulations using the near-field equivalent source representation. In an aspect, an elementary dipole array may be used to generate the near-field equivalent source representation from the field measurements.

主权项

1. A method for estimating specific absorption rate (SAR) from a wireless device (WD), the method comprising:
measuring the magnitude of at least one component of an electric or magnetic field over a two-dimensional surface in the vicinity of the wireless device; and deriving a near-field equivalent source representation of the wireless device based on the measured electric or magnetic field components, including:
producing an elementary dipole array representation of the wireless device;validating the elementary dipole array representation with the measured electric or magnetic field components; andif the elementary dipole array representation does not correlate with the measured electric or magnetic field components as determined by an accuracy metric, then either increasing the spatial resolution of the measuring or decreasing the separation between the two-dimensional surface and the wireless device; and estimating the SAR at a location relative to the wireless device using the derived near-field equivalent source representation.