| CPC H01Q 9/045 (2013.01) [H01Q 1/48 (2013.01)] | 9 Claims |
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1. An antenna device comprising:
a main board made of a dielectric material;
a ground board disposed at the main board and configured to supply a ground potential;
a patch disposed at the main board to face the ground board in a thickness direction of the main board;
a power feeder disposed at the main board and electrically connected to the patch;
a short-circuit portion including a via conductor disposed at the main board, and electrically connected to the patch and the ground board; and
an additional conductor disposed at the main board such that a side surface of the additional conductor faces a side surface of the patch, and having a potential identical to the ground potential of the ground board,
wherein the patch includes:
an outer surface configured to define an outer contour of the patch, the outer surface being the side surface of the patch;
at least one slit having an aperture opening to a position that is apart from a part of the outer surface electrically connected with the power feeder; and
an inner surface configured to define the slit, the inner surface being the side surface of the patch, and
wherein the additional conductor includes:
a base portion that extends in an extending direction along the outer surface of the patch, and that is disposed to face the outer surface around the aperture of the slit;
an inserting portion that is connected to the base portion, and that is disposed inside the slit to face the inner surface of the patch; and
a connecting portion that extends from the base portion, and that electrically connects the ground board and the additional conductor.
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