IEC 62431:2008 pdfダウンロード。Reflectivity of electromagnetic wave absorbers in millimetre wave frequency – Measurement methods 1 Scope This International 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 range: 30 GHz to 300 GHz reflectivity: 0 dB to -50 dB incident angle: 0to 80° NOTE This standard is applicable not only to those EMA which are widely used as counter-measures againstcommunication faults, radio interference etc. , but also to...