Wiener–Khinchin Theorem in a Reverberation Chamber

The use of the Wiener–Khinchin theorem in the reverberation chamber reveals the relationships between a number of important parameters—the coherence bandwidth and the <italic>Q</italic>-factor measured in the time domain, the coherence time and the <italic>Q</italic>-factor measured in the frequency domain, the <italic>K</italic>-factor and the Doppler spectrum, and the <italic>K</italic>-factor and the total scattering cross section. The lower bound of the average <italic>K</italic>-factor is also given. Different physical quantities, which share similar mathematical insights, are unified. Analytical derivations are given, and results are validated by measurements.

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