Abstract:
Background The reverberation chamber (RC) is widely used for electromagnetic compatibility testing. The field anisotropy coefficient is a key parameter for quantitatively evaluating its performance and enabling comparisons between different chambers, playing a critical role in assessing RC quality.
Purpose This study aims to evaluate the field anisotropy coefficient of a reverberation chamber according to standard methods, verify its performance level, and propose an optimized testing approach to reduce the complexity and time required for measurement while maintaining accuracy.
Methods First, the theoretical distribution of the field anisotropy coefficient was reviewed, indicating ideal values of 0 for 2D and 0.5547 for 3D. Measurements were then carried out using a three-axis electric field probe following standard procedures. To streamline the process, an optimized method based on scattering parameters was introduced, significantly reducing the number of required measurements.
Results The standard measurement results showed that the 2D field anisotropy coefficient fell within −0.1, 0.1, and the 3D coefficient was between 0.5254, 0.5589. Overall, the values were below −15 dB, indicating “good” performance of the chamber according to the standard. The proposed optimized method produced consistent results, with field anisotropy coefficients largely remaining below −15 dB except for a few frequency points.
Conclusions The reverberation chamber under test demonstrates good performance. The proposed scattering parameter-based method greatly reduces test time and complexity while yielding results consistent with those of the standard approach. This offers valuable practical guidance for efficient and accurate reverberation chamber evaluation.
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