Analysis of Shielding Effectiveness of the Cavity Built with Single-Layer Reinforced Concrete

Table 3

Comparison of the resonance point shielding effectiveness under different concrete electromagnetic parameters.

Parameters of the concrete	The resonance point shielding effectiveness of the steel cage (dB)	The resonance point shielding effectiveness of the reinforcement concrete (dB)
ε r = 4.5, σ = 0.0005 S/m	−17.6335	−17.6673
ε r = 8.6, σ = 0.0005 S/m	−17.6635	−15.7141
ε r = 13, σ = 0.0005 S/m	−17.6635	−14.0856
ε r = 4.5, σ = 0.021 S/m	−17.6635	−5.2077
ε r = 4.5, σ = 0.5 S/m	−17.6635	15.2321
Moisture content 0.2%	−17.6635	−15.3911
Moisture content 5.5%	−17.6635	−6.1476
Moisture content 12.0%	−17.6635	1.0986