A Cosed-Loop Calibration Method for the Vibrating Intrinsic Reverberation Chamber

The Vibrating Intrinsic Reverberation Chamber (VIRC) is a special resonant cavity with flexible conductive walls. It can be used to check the susceptibility of electronic equipment to external radiated electromagnetic fields. This work suggests a closed-loop calibration method to adjust the expected level of the field strength in the working volume of the cavity. The regulation of the field level is based on its average value and is particularly useful whenever the VIRC is used as temporary installation to transform a semi-anechoic chamber in a reverberation environment. In this case, a closed-loop calibration method appears to be more suitable as it permits fast regulation of the test field after new installation of the test environment