Common mode chokes for EMI suppression in telecommunication systems

Abstract

In this paper design of common mode choke (CMC) for EMI suppression in telecommunication systems will be presented. Choke consists of two highly conductive layers embedded in Nickel zinc ferrite. Influences of different ferrite materials and geometrical parameters are analyzed. Software tool ILCMC for calculation of insertion loss of common mode choke has been developed. Using ILCMC simulations have been conducted for different geometrical dimensions of structure and different ferrite materials. Insertion losses of proposed components are calculated and compared.