Alternative magnetic field immunity test by using large loop antenna

Abstract

Magnetic field immunity tests are performed in laboratories in Screen Chambers (SC) in accordance with the standard IEC/EN 61000-4-8 by using a 1 m × 1 m loop antenna. However, the EMC tests of the Equipment Under Test (EUT) sometimes cannot be carried out in laboratories due to several restrictions. In case of EUT with large dimensions, high power consumptions and/or auxiliary devices which are attached to EUTs, it is not possible to use laboratory facilities during tests. As a consequence, on-site magnetic field immunity tests are required in industry. For that reason adapted measuring methodologies and procedures are needed in industrial measurements. In this study, we experimentally investigated the uniform area of a self-made large loop antenna according to the relevant standard.