What aspects should you consider when selecting ferrite materials?

• Energy sources that radiate or conduct

• Environmental conditions (increased temperature can reduce overall impedance and performance)

• Circuit impedance of source and load

• Amount of attenuation required

• Space size allowed on PCB

• Impedance exhibited by the ferrite material to the circuit

• Permeability value in the selected operating frequency rangeAdditional “unwanted” signal attenuation is generated.

• Additional windings on the beads or cores increase the shielding impedance (however, the performance of the spectral bandwidth is reduced)