Portable Host Device Simultaneous Transmission Regulatory SAR Evaluation Procedures
Simultaneous transmission SAR evaluation demands spatial ratio summation, proximity sensor backoff calibration, and time-averaged power tracking across radios.
IEC 62209
Meaning
International measurement standards establish the protocol for assessing the specific absorption rate of electromagnetic fields generated by handheld and body-mounted wireless communication devices. Published by the International Electrotechnical Commission, iec 62209 defines the procedure to evaluate devices operating in the frequency range from 30 MHz to 6 GHz. The standard applies to evaluations conducted close to the human ear or body, but it does not cover exposure from base station antennas or far-field radiation sources.
Measurement Methodology
The test procedure employs a robotic arm that moves a high-precision electric field probe through a simulated tissue medium. Testing under iec 62209 requires the device to transmit at its maximum rated power across several channels. Sensor readings capture the internal field distribution to compute the localized energy absorption.
This scan is repeated for different device positions and frequency bands.
Phantom Specification
A plastic shell shaped like a human head or torso holds the liquid that simulates the electrical properties of human tissue. The iec 62209 guidelines specify the precise permittivity and conductivity of this formulation for each target frequency. This ensures that the simulated absorption matches the physiological reality of the human body.
Robotic scanners probe this liquid to locate the point of maximum energy deposition.
Compliance Requirement
Manufacturers use the resulting data to generate official test reports for regulatory approval. The iec 62209 framework provides a repeatable testing environment to compare different hardware designs. Mobile devices must demonstrate values below the specified limit.