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Slot antenna device

  • US 10,601,144 B2
  • Filed: 04/05/2018
  • Issued: 03/24/2020
  • Est. Priority Date: 04/13/2017
  • Status: Active Grant
First Claim
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1. A slot antenna device, comprising:

  • a first electrically conductive member having a first electrically conductive surface on a front side and a second electrically conductive surface on a rear side, and having at least one slot extending from the first electrically conductive surface through to the second electrically conductive surface;

    a second electrically conductive member on the rear side of the first electrically conductive member, the second electrically conductive member having a third electrically conductive surface on the front side, the third electrically conductive surface opposing the second electrically conductive surface;

    a ridge-shaped waveguide member on the second electrically conductive surface of the first electrically conductive member, the waveguide member having an electrically-conductive waveguide face that opposes the third electrically conductive surface and extending alongside the third electrically conductive surface; and

    an artificial magnetic conductor on at least one of the second electrically conductive surface and the third electrically conductive surface, the artificial magnetic conductor extending on both sides of the waveguide member, wherein,the third electrically conductive surface, the waveguide face, and the artificial magnetic conductor define a waveguide in a gap extending between the third electrically conductive surface and the waveguide face;

    the waveguide member includes a first ridge and a second ridge;

    one end of the first ridge and one end of the second ridge are opposed to each other;

    as viewed from a direction perpendicular to the waveguide face, the at least one slot is located between the one end of the first ridge and the one end of the second ridge; and

    the at least one slot is open to an external space through the first electrically conductive surface.

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