Question

Household aluminum foil is typically 0.016 mm thick, and heavy duty household foil is typically 0.024 mm . Can it be used to block 10 GHz signals.? Explain by showing relevant calculations.

Answer 1

To understand whether a particular foil is good or not we need to check skin depth

Skin depth is depth upto which current flows in a material

Its formula is given by

where rho is resistivity of material which of aluminium is given as

f is frequency which in our case is 10GHz

Put all values in above eqn

As skin depth is this and given aluminium foil is more thick as compared to this, hence both given foils household aluminium foils and heavy duty can be used to block 10 GHz signals