Total Shielding Effectiveness:

\\[ \text{SE} = A + R + B \\]

Absorption Loss:

\\[ A = 131.4 \, t \sqrt{f \mu_r \sigma} \\]

Reflection Loss (Far Field, Plane Wave):

\\[ R = 168 – 10 \log_{10} \left( \frac{f \mu_r}{\sigma} \right) \\]

Multiple Reflection Correction:

\\[ B = 20 \log_{10} \left( 1 – e^{-2t / \delta} \right) \\]

Skin Depth:

\\[ \delta = \frac{1}{\sqrt{\pi f \mu_0 \mu_r \sigma}} \\]

Where:

• \\( \text{SE} \\): Shielding effectiveness (dB)
• \\( A \\): Absorption loss (dB)
• \\( R \\): Reflection loss (dB)
• \\( B \\): Multiple reflection correction (dB, typically negligible for thick shields or high frequencies)
• \\( \sigma \\): Conductivity of the shield material (S/m)
• \\( \mu_r \\): Relative permeability of the material
• \\( \mu_0 \\): Permeability of free space (\\( 4\pi \times 10^{-7} \, \text{H/m} \\))
• \\( t \\): Shield thickness (m)
• \\( f \\): Frequency of the electromagnetic wave (Hz)
• \\( \delta \\): Skin depth (m)

\\[ \mu_0 = 4\pi \times 10^{-7} \approx 1.257 \times 10^{-6} \, \text{H/m} \\] \\[ \delta = \frac{1}{\sqrt{\pi \cdot 1 \times 10^6 \cdot 1.257 \times 10^{-6} \cdot 1.0 \cdot 5.96 \times 10^7}} \approx 6.52 \times 10^{-5} \, \text{m} \\] \\[ A = 131.4 \cdot 0.001 \sqrt{1 \times 10^6 \cdot 1.0 \cdot 5.96 \times 10^7} \approx 101.43 \, \text{dB} \\] \\[ R = 168 – 10 \log_{10} \left( \frac{1 \times 10^6 \cdot 1.0}{5.96 \times 10^7} \right) \approx 149.77 \, \text{dB} \\] \\[ B = 20 \log_{10} \left( 1 – e^{-2 \cdot 0.001 / 6.52 \times 10^{-5}} \right) \approx -0.01 \, \text{dB} \\] \\[ \text{SE} = 101.43 + 149.77 – 0.01 \approx 251.19 \, \text{dB} \\]