SHIELDING-EFFECTIVENESS CHARACTERIZATION FOR HIGHLY RESONANT STRUCTURES APPLICABLE TO SYSTEM DESIGN.

Experimental measurements and computational predictions are made of the transient interior response of a simple, 1-m-high, cylindrical test object at Lawrence Livermore National Laboratory. The measurements were performed at the Transient Range Facility and the computations were made with the three-dimensional time-domain finite-difference code G3DXL3. Inside the test object, wires were run at different locations with a mix of short and open terminations. Cable currents at the base of the wires were measured for several geometries and compared with code predictions. A method of characterizing and understanding the coupling process from a shielding-effectiveness (SE) standpoint that properly accounts for internal cavity responses is described. This method can be used to develop a large array of shielding-effectiveness functions useful to system designers.