ELECTROMAGNET NOISE SUPPRESSION FILTER Russian patent published in 2009 - IPC H02J1/02 

FIELD: radio engineering.

SUBSTANCE: invention is related to electronic engineering and may be used to suppress electromagnet noise in power supply circuits for telecommunication equipment, HF and SHF equipment and in other devices of signal digital processing. Electromagnet noise suppression filter consists of induction coils (2) made on substrate with maximum possible magnetic permeability, their mutual location increases their inductivity. To prevent connection of coils along electric field, there is an electrostatic screen (3) arranged between them. Electrostatic screen is arranged on substrate with maximum dielectric permeability, in screen centre there is a small opening for electric connection of central terminals of coils. Electrostatic screen (3) and external plates (1), which are also made on substrate with maximum dielectric permeability, are plates of capacitors, the second plate is represented by the coils themselves. Metallisation of electrostatic screen must not possess magnetic properties, metallisation of external plates may possess magnetic properties, which will result in minimisation of external magnetic fields radiated by filter.

EFFECT: improved efficiency of radio element supply voltages filtration.

2 dwg