Reverberation Chambers for EMC

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The mode-stirrer in York's reverberation chamber

The frequency of operation of electronic devices and wireless communications is steadily increasing into the GHz range. Whilst a range of EMC measurement techniques exist for use in the frequency range up to 1GHz, new measurement techniques are required above 1GHz. The reverberation chamber is one such technique. It offers the capability to perform emissions and immunity measurements from a few hundred MHz upwards with a larger working volume than possible in conventional (semi-) anechoic chambers and absorber lining is not required.

High field strengths are achievable with lower power than conventional anechoic chambers. The reverberation chamber illuminates a test object with equal energy from all directions and with all polarisations ensuring that a thorough immunity test is performed.

For emissions measurements the reverberation chamber measures total radiated power. This avoids the need to determine the direction of maximum emissions which becomes increasingly difficult at frequencies above 1GHz due to the possible high directivity of test objects and the difficulty of performing measurements in the far field pattern.

Key subjects covered

This course covers the operation of reverberation chambers for emissions and immunity measurements. The principles are presented through lectures with associated demonstrations.

Who should attend

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Last Updated: 2014-Feb-11