Abstarct: Development of electronic devices baxsed on power electronic converters and side effects such as electromagnetic interference is a major subject nowadays and manufacturing products is to some extent impossible without satisfying standard limits. Electromagnetic Interference (EMI) is any noise or signal which causes either interruption in the operation, or degradation of the effective behavior of other installed devices. In order to measure the EMI and noise signals a device is needed to couple the high frequency components of noise signal to the measurement devices. Line impedance stabilization network (LISN) is a passive network by which the EMI signals are coupled to the measuring system. In order to ensure repeatability and reproducibility in EMI measurement tests, the EUT should observe an approximately constant impedance in a wide range of frequency. In this thesis the complete procedure of design and construction of LISN is presented. SRF of the inductors have been considered as criteria for selection of the suitable design of inductors. Finite element analysis is used for best locating of inductors in the mextal enclosure of LISN and to obtain a clear vision toward its behavior in a wide range of frequency. Wattage selection of the resistors has been done baxsed on simulating EMI signal of a converter in SIMUlixnk environment and ANSYS SIMPLORER is used to ensure the right impedance characteristic of the proposed circuit for LISN. Measurement of the impedance characteristic of LISN was performed by a VNA. Unless otherwise using an adapter, the measurement couldn’t be possible and the test would lead to false results. Finally, the effect of the adapter in the measured impedance of the LISN was eliminated using analytical calculated ABCD matrix of the adapter and extracting its impact from the S1P parameter of the LISN. Correct performance of the LISN is guaranteed by measurements of EMI in several states of non-switching, switching and applying voltage, and normal operation of a power electronic converter (inverter module) in nominal conditions.