Laird Technologies, Inc. has developed an online shielding effectiveness calculator, which is available free of charge on the Laird Technologies website.
The shielding effectiveness calculator draws on a library of available shielding materials to calculate their shielding effectiveness. Users can also simulate their own material by entering the material’s relative conductivity and relative permeability. Parameters for the shielding computation include material thickness, relative permeability, relative conductivity, and a user-defined pattern of apertures. Other selectable parameters are offered as well, such as aperture aspect ratio, frequency range, and emitter location and distance. Multiple measurement units are also supported.
After the data is entered, the calculator computes shielding effectiveness over the selected frequency range, and if there are apertures it plots their pattern.
Image: Laird Technologies