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Electromagnetic reverberation chamber
An electromagnetic reverberation chamber (also known as a reverb chamber (RVC) or mode-stirred chamber (MSC)) is an environment for electromagnetic compatibility (EMC) testing and other electromagnetic investigations. Electromagnetic reverberation chambers have been introduced first by H.A. Mendes in 1968.〔Mendes, H.A.: ''A new approach to electromagnetic field-strength measurements in shielded enclosures.'', Wescon Tech. Papers, Los Angeles, CA., August, 1968.
〕 A reverberation chamber is screened room with a minimum of absorption of electromagnetic energy. Due to the low absorption very high field strength can be achieved with moderate input power. A reverberation chamber is a cavity resonator with a high Q factor. Thus, the spatial distribution of the electrical and magnetic field strengths is strongly inhomogeneous (standing waves). To reduce this inhomogeneity, one or more ''tuners'' (''stirrers'') are used. A tuner is a construction with large metallic reflectors that can be moved to different orientations in order to achieve different boundary conditions. The ''Lowest Usable Frequency'' (LUF) of a reverberation chamber depends on the size of the chamber and the design of the tuner. Small chambers have a higher LUF than large chambers.
The concept of a reverberation chambers is comparable to a microwave oven.
==Glossary/notation==
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