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Antenna device and electronic apparatus

  • US 10,224,632 B2
  • Filed: 08/02/2017
  • Issued: 03/05/2019
  • Est. Priority Date: 02/03/2015
  • Status: Active Grant
First Claim
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1. An antenna device comprising:

  • an insulating substrate including a principal surface; and

    a coil antenna disposed on the substrate and including a coil conductor;

    whereinthe coil conductor includes a winding axis in a direction parallel or substantially parallel to the principal surface of the substrate;

    the coil conductor is wound by one full turn or more when seen from the direction of the winding axis of the coil conductor; and

    an auxiliary loop conductor that is connected to the coil conductor and generates a magnetic flux that is in phase with that of the coil antenna as seen from a direction of the winding axis of the coil conductor is provided in or on the substrate.

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