Abstract: The invention relates to a method for measuring the magnetic permeability of a magnetic material by measuring the magnetic interaction of an electromagnetic field with this material by using a measuring device including a measuring cell connected through a microwave frequency cable (13) to a vector network analyser (12), said method comprising steps for gauging/calibrating said measuring device, for determining corrective coefficients to be applied to the measurements obtained by means of this device, for verifying the non-drift of this device, these steps being carried out with the help of a reference sample, wherein a reference sample is used, comprising at least one inclusion which enables creation, in a given volume, of a local artificial permeability, each inclusion being achieved by combining at least one inductive component possibly associated with a combination of at last one capacitive and/or resistive and/or active component, the frequency response of the electromagnetic properties of each volume be

Abstract: The invention relates to a method for measuring the magnetic permeability of a magnetic material by measuring the magnetic interaction of an electromagnetic field with this material by using a measuring device including a measuring cell connected through a microwave frequency cable (13) to a vector network analyser (12), said method comprising steps for gauging/calibrating said measuring device, for determining corrective coefficients to be applied to the measurements obtained by means of this device, for verifying the non-drift of this device, these steps being carried out with the help of a reference sample, wherein a reference sample is used, comprising at least one inclusion which enables creation, in a given volume, of a local artificial permeability, each inclusion being achieved by combining at least one inductive component possibly associated with a combination of at last one capacitive and/or resistive and/or active component, the frequency response of the electromagnetic properties of each volume be

Abstract: A high-impedance substrate including a first layer made of insulating material, having a lower face and an upper face, the substrate including conductor patterns mechanically linked to the substrate. Some of the conductor patterns mechanically linked to the substrate are associated with a magnetic tile. At least one electrical interconnection puts two points distinct from one another of a conductor pattern mechanically linked to the substrate in electrical contact, this conductor pattern having an assigned magnetic tile, passing above the magnetic tile associated with the conductor pattern mechanically linked to the substrate.

Abstract: A high-impedance substrate including a first layer made of insulating material, having a lower face and an upper face, the substrate including conductor patterns mechanically linked to the substrate. Some of the conductor patterns mechanically linked to the substrate are associated with a magnetic tile. At least one electrical interconnection puts two points distinct from one another of a conductor pattern mechanically linked to the substrate in electrical contact, this conductor pattern having an assigned magnetic tile, passing above the magnetic tile associated with the conductor pattern mechanically linked to the substrate.

Abstract: The invention relates to a marked paper document and a marked paper document detection device. The device comprises excitation means (A1, A2, A3) for varying the magnetization of glass-covered amorphous ferromagnetic filaments contained in the marked paper document with time, and means for detecting a variation in the magnetization of the ferromagnetic filaments.