Inductor device, method of manufacturing same and antenna

A method of manufacturing an inductor device, comprising:

• producing an electrically insulating support (10) by injection molding, being made of a single hollow part open on one of the faces thereof with a rectangular prismatic cavity (11), provided for completely housing a magnetic core (1), and being accessible through an opening surrounded by a frame (50) having four sides (51) arranged opposite one another in pairs, said support being provided with:
• two orthogonal winding up channels dimensioned to delimit respective two orthogonal windings (DX, DY), said winding up channels being defined by winding supporting outer faces (12X, 12Y and 12Z) each perpendicular to one axis X, Y or Z, winding limiting edges (22) perpendicular to the winding supporting outer faces (12X, 12Y), four additional winding supporting outer faces (12X and 12Y) formed on said four sides (51) of the frame (50) and the winding limiting edges (22) associated therewith;
• winding supporting outer faces (12Z) perpendicular to one of said axis X and Y and configured to support a third winding (DZ) orthogonal to the other two windings (DX, DY);
• and
• four lower corner protuberances (20) including winding limiting edges (22) perpendicular to the winding supporting outer faces (12X, 12Y and 12Z),
• providing, inside said rectangular prismatic cavity (11) of the electrically insulating support (10), a rectangular prismatic magnetic core (1) with eight vertexes and three pairs of opposite faces facing and parallel to one another ,defining said three axes X, Y and Z orthogonal to one another each perpendicular to one of said pairs of faces and passing through the geometric center of the faces;
• providing three windings (DX, DY, DZ) of conductive wire (40) arranged orthogonal to one another, wound around said magnetic core (1) and supported on the winding supporting faces (12X, 12Y and 12Z), confined between the winding limiting edges (22);
• wherein the method includes:
• produce the electrically insulating support (10) through a two-part mold lacking of upper corner protuberances in correspondence with the remaining four vertexes of the magnetic core (1), with said frame being arranged flush with or above the level of the magnetic core (1), and with the two orthogonal winding up channels being centered with respect to the orthogonal axes X, Y and Z,
• wound the third winding (DZ) on said winding supporting outer faces (12Z) delimited on one side by said limiting edges (2) of the lower corner protuberances, centered with respect to the orthogonal axes X and Y, configured so that in combination with the dimensions of the magnetic core and with the other two orthogonal windings (DX, DY) define three isotropic orthogonal magnetic fields,
• wherein removable upper corner protuberances (21) are furthermore provided before winding up the winding (DZ) around the axis (Z) and are removed when said winding up ends, such that the winding supporting faces (12Z) for supporting the winding (DZ) around the axis (Z) are demarcated between the electrically insulating support (10) and said removable upper corner protuberances (21) during the winding up step.