IEC 62431 pdf download Reflectivity of electromagnetic wave absorbers in millimetre wave frequency – Measurement methods 1 Scope This lInternational Standard specifies the measurement methods for the reflectivity ofelectromagnetic wave absorbers(EMA) for the normal incident, oblique incident and eachpolarized wave in the millimetre-wave range. In addition, these methods are also equallyeffective for the reflectivity measurement of other materials: measurement frequency...