On the Equivalence of Working Volumes in Reverberation Chambers Close to the Lowest Usable Frequency

The equivalence of multiple working volumes (WV) are investigated in this work by the regime of state-of-the-art sensitivity analysis (SA) techniques. To this end, surrogate modeling was utilized to efficiently calculate the Sobol’ indices as a measure of uncertainty quantification (UQ). This approach helps to appraise the contributions of different configuration parameters in the frequency range close to the lowest usable frequency (LUF), where well-stirred conditions are not met., yielding a proficient apparatus to ease the measurement process of parallelized radiated immunity (RI) tests.