MICROWAVE DEVICE FOR CONTROLLING A MATERIAL

摘要

The invention relates to a control device (100) for controlling a material (150) that comprises at least transmission means (110) for transmitting an electromagnetic signal at a carrier frequency Fp for radiating the material (150) and reception means (130) for receiving the electromagnetic signal, characterised in that it further comprises first means for modulating the electromagnetic signal at a frequency Fm1, said modulation means being provided on the signal path between the transmission means (110) and the material (150) for spatially discretising the transmitted electromagnetic signal and second means (140) for modulating the electromagnetic signal at a frequency Fm2 and provided on the signal path between the material (150) and the electromagnetic signal reception means (130) for spatially discretising the electromagnetic signal after it has crossed the material. The device can mainly be used for detecting defects in a material or for determining the physical properties of said material.