Magnetic shielding unit for magnetic security transmission, module comprising same, and portable device comprising same
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United States of America Patent
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Feb 23, 2021
Grant Date -
Nov 1, 2018
app pub date -
Sep 30, 2016
filing date -
Sep 30, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is a magnetic field shielding unit for magnetic security transmission. The magnetic field shielding unit for magnetic security transmission includes a magnetic shielding layer formed of fragments of ferrite containing magnesium oxide (MgO) shredded to improve flexibility of the magnetic field shielding unit. The ferrite containing magnesium oxide has a real part (μ′) of the complex permeability of 650 or more at a frequency of 100 kHz. Accordingly, it is possible to prevent influence of a magnetic field on components of a mobile terminal device or a body of a user who uses the same, and to further increase the characteristics of the combined antennas even if the magnetic field shielding unit is combined with various kinds and purposes of antennas having various structures, shapes, sizes and intrinsic characteristics (inductance, resistivity, etc.).
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