Generating Electric Fields for Air Sensitivity Measurement of Specific Absorption Rate Probe

To measure the air sensitivity of a specific absorption rate (SAR) probe, an electric field (E-field) generation system is implemented using field-generating cells, a transverse electromagnetic (TEM) cell below 1 GHz and waveguides in 1.12-2.6 GHz-frequency range. The output side of the field-generating cells is terminated with an attenuator and a power sensor to determine the E-field strength which is traceable to power and attenuation standards. Measured results with the estimated uncertainty are presented at 835 MHz and 1800 MHz.