Time-domain nested-enclosure technique for shielding effectiveness characterisation

Enclosure shielding effectiveness (SE) is investigated using a reverberation chamber methodology in the time domain (TD). The TD technique is first calibrated on an in-house coaxial airline. A nested-enclosure approach is then presented and checked against a frequency-domain (FD) equivalent evaluation. Good agreement is shown between the theoretical and measured airline results. TD and FD nested-enclosure SE agree to within 5 dB from 400 MHz to 1.2 GHz. Measurement time reduction, along with greatly increased frequency information, are derived in the TD.