Prototype of Device Based on Hybrid Junctions for Measuring Electromagnetic Conducted Emissions

The paper concerns with the realization of a device for measurement of EM conducted interferences, in alternative to set-up suggested by CISPR standard rules. This technique allows, in particular, the separation of common mode and differential mode interference components. On the contrary of traditional set-up based on Delta-type LISN, the proposed system is less expensive and more compact. The device is based on three current and voltage probes with wide frequency bandwidth and three hybrid junctions separating the disturbance components; a dsPic is mandated to alternatively select the proper output, sample the interference signal and transmit data to an external process unit