This International Standard specifies the measurement methods for the reflectivity of
electromagnetic wave absorbers (EMA) for the normal incident, oblique incident and each
polarized wave in the millimetre-wave range. In addition, these methods are also equally
effective for the reflectivity measurement of other materials:
- measurement frequency range: 30 GHz to 300 GHz;
- reflectivity: 0 dB to-50 dB;
- incident angle: 0~ to 80~.
NOTE This standard is applicable not only to those EMA which are widely used as counter-measures against
communication faults, radio interference etc., but also to those used in an anechoic chamber in some cases. EMAs
may be any kind of material, and may have any arbitrary shape, configuration, or layered structure as pointed out
below.
Material: Conductive material, dielectric material, magnetic material.
Shape: planar-, pyramidal-, wedge-type, or other specific shapes.
Layer structure: single layer, multi layers, or graded-index material.