This standard specifies methods for measuring the amount of reflection of radio wave absorbers for normal incidence, oblique incidence, and each polarization with a reflection amount of 0 to -50 dB and an incident angle of 0° to 80° in the frequency range of 30 GHz to 300 GHz. stipulates. Furthermore, this measurement method is also effective for measuring the amount of reflection from substances and materials other than radio wave absorbers.
JIS R 1679:2007 history
2007JIS R 1679:2007 Measurement methods for reflectivity of electromagnetic wave absorber in millimetre wave frequency