The power wave filter is a new one that adopts good-quality,high-frequency Fe-oxidized material as magnetic core and works as per zero magnetic flux principle.It has fine characteristics of EMI and EMC,and it is also widely used in various kinds of product such as CTV,MONITOR,computers,air-conditioning equipment,OA equipment and other home appliances. The sensor adopts high-frequency Fe-oxidized or Fe-Ni alloy as magnetic core.It is mainly used in filtering wave,storing energy,choke and CRT field scanning linearization.This component is widely used as one of the three basic units of electric circuit.