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Mobile terminal and coil antenna module

  • US 9,761,928 B2
  • Filed: 11/25/2015
  • Issued: 09/12/2017
  • Est. Priority Date: 03/04/2015
  • Status: Active Grant
First Claim
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1. A mobile terminal comprising:

  • a first case comprising a battery loading portion;

    a battery located in the battery loading portion;

    a second case coupled to the first case and configured to cover the battery;

    a coil antenna module arranged between the second case and the battery; and

    a controller electrically connected to the coil antenna module and configured to transmit and receive a signal or receive electric power,wherein the coil antenna module comprises;

    an insulating sheet having a first surface and a second surface;

    a first coil arranged on at least one of the first surface or the second surface;

    a second coil, wherein at least a portion of the second coil is positioned outside of the first coil;

    a third coil, wherein at least a portion of the third coil is positioned outside of the second coil; and

    a magnetic sheet positioned over the first coil, the second coil and the third coil,wherein respective ends of at least one of the first coil, the second coil, or the third coil are positioned on the first surface,wherein a number of windings of the first coil is larger than a number of windings of the third coil,wherein the first coil is used for a wireless charging antenna, the second coil is used for a payment antenna and the third coil is used for a near-field communication (NFC) antenna,wherein a frequency of the wireless charging antenna is lower than a frequency of the NFC antenna,wherein the frequency of the wireless charging antenna and the frequency of the NFC antenna are related to the number of windings of the first coil and the third coil, respectively, andwherein the controller is further configured to communicate payment information associated with a registered credit card to an external terminal through the second antenna in a frequency band of 100 kHz or less.

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