5G Millimeter Wave Devices: The Impact on EMC Compliance Tests
This whitepaper details the challenges presented by 5G millimeter wave (mmWave) devices to existing EMC compliance testing procedures. The authors highlight that while standards evolution typically lags deployment, 5G's use of both Frequency Range 1 (FR1 – sub-6 GHz) and Frequency Range 2 (FR2 – up to 52.6 GHz) necessitate significant adaptations to current methods. Key concerns revolve around the transition from conducted measurements due to complex antenna arrays in FR2, and the impact of near/far field boundaries at higher frequencies like 60GHz where wavelength is only 5mm. The paper emphasizes that accurate testing requires considering antenna placement, beamwidth (down to ~10 degrees for FR2), path loss variations – which can exceed 73dB at 3 meters and 39 GHz – and the limitations of current measurement systems. Relevant standards mentioned include ITU-T K Supplement 10, CISPR, FCC Part 30, and ETSI regulations focused on EIRP (Effective Isotropic Radiated Power) and TRP (Total Radiated Power).
