The Effect of Peripheral Equipment Loading on Reverberation-Chamber Metrics

Abstract

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Chamber-Decay Time in a mm-Wave Reverberation Chamber

“…Compared to measurements in reverberation chambers that operate in a lower frequency range, the chamber decay time, Q TD and Q FD of unloaded mm-wave RCs are significantly lower, as was also the case in [1]- [3], [6] (Q FD is lower than Q TD since it includes antenna losses). This means that a signal transmitted in a mm-wave chamber such as the one used in this work still reaches the noise floor over three times faster than the chambers used in [4]. This may be due to leakage or increased material losses, however, note that the latter is partially compensated for by reducing the size of the chamber.…”

“…The chamber-decay time or time constant, τ RC , is defined by the slope of the exponentially decaying part of the power delay profile (PDP), which is defined by the inverse Fourier transform of an S 21 measurement [4]. In this work, we estimated the time constant in a V = 0.2311 m 3 reverberation chamber with two stirrers, as shown in Fig.…”

“…With this information, metrics can be measured fast and accurate that would usually require an integration over a sphere in an anechoic chamber such as antenna efficiency, total radiated power, total isotropic sensitivty, etc. [1]- [4].…”