Magnetic core for antenna, method for producing magnetic core for antenna, and antenna
A magnetic core and antenna technology, applied in the field of magnetic cores for antennas, manufacturing magnetic cores for antennas and antennas, can solve the problems of fragility, property degradation, cracks and other problems of ferrite, and achieve less brittleness and small curvature Effect
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[0065] In the following, we will refer to figure 1 , 2A And 2B describe a method of manufacturing a magnetic core for an antenna according to the present invention.
[0066] figure 1 A laminate 3 obtained by heat-treating the thin metal strip 1 in a magnetic field and stacking the thin metal strip 1 through an insulating layer 2 is shown. figure 1 The longitudinal (cross-cut) direction in is the longitudinal direction of a thin strip obtained by slitting a thin metal strip manufactured with a hyperquenching roll. The magnetic field is applied in a direction perpendicular to the longitudinal direction, and reference mark 4 indicates the direction of induced magnetic anisotropy. At the time of stacking, for example, the thin metal strip 1 is coated with a polyamic acid solution as a precursor of a polyimide resin, and pressure-bonded by roll pressing. Thus, the stacking process can be performed in a roll-to-roll (Roll-to-Roll) process, so continuous manufacturing is possible. T...
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