Whitepaper
Multi-Purpose Anechoic Chambers - EMC (SAR/FAR) to Antenna Measurements
This paper investigates the versatility of a 3m semi-anechoic chamber (SAR 3) – specifically an ETS-Lindgren model with internal dimensions of 9m x 6m x 6m – in meeting increasingly diverse EMC standards across various industries including automotive, aerospace, and telecommunications. The authors detail how the chamber can be adapted for both Radiated Immunity/Emission testing below (30 MHz - 1 GHz) and above (up to 18GHz) 1 GHz, conforming to standards like EN 50147-2, IEC 61000.4.3-2002, and the evolving CISPR 16-1-4 for Fully Anechoic Rooms (FARs). Key findings demonstrate compliance with NSA & FSNSA tests showing deviations within ±4dB across critical frequencies, as well as quick conversion times (under 30 minutes) between SAR and FAR configurations by utilizing removable ferrite panels. The paper also addresses challenges related to antenna selection (log-periodic vs. horn) and cable performance above 1 GHz, highlighting the limitations of current transmission loss validation methods.