Copyright © 2015 Directed Energy Technologies, Inc.
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Appendix A: Shielding Effectiveness Testing
Antennas are placed both inside and outside of the test area in order to measure RF leakage through the electromagnetic barrier. Frequencies are swept from 10kHz -
(Where Vcalibration represents the received antenna signal in open space and Vmeasured is the signal measured through the EM barrier.)
Shielding effectiveness testing often identifies penetrations or defects in the shield which would have never been observed visually. Measurements are repeated every 8 to 10 feet along the electromagnetic barrier.
Appendix B: Pulsed Current Injection
All Power, Signal, Data and Antenna Lines coming into or leaving a shielded enclosure must be protected. DEtech uses state of the art, compact pulsed current injection systems to ensure that these protective devices will operate correctly and to specification. These highly specialized current sources replicate actual threat characteristics.
Appendix C: Continuous Wave Immersion (CWI) Illumination
CWI testing is performed by illuminating the exterior surface of the electromagnetic barrier with radiated CW fields and surveying the interior to identify defects and leakage.