| 主权项 |
1. An antenna device comprising:
a printed circuit board; and a capacitance coupling element mounted on the printed circuit board, wherein the capacitance coupling element includes:
a substrate that is made of dielectric material; andfirst and second capacitors that are provided in the substrate, the printed circuit board includes:
a ground clearance region that is defined on one principal surface of the printed circuit board, the capacitance coupling element being mounted on the ground clearance region;a main circuit region that has a ground pattern;first to third strip patterns that are provided in the ground clearance region; andfirst and second feeding lines that are elongated from the main circuit region to the ground clearance region, the first strip pattern has one end connected to one end terminal of the first capacitor of the capacitance coupling element and the other end connected to the first feeding line, the first strip pattern extending in a first direction from the one end thereof to the other end thereof, the second strip pattern has one end connected to one end terminal of the second capacitor of the capacitance coupling element and the other end connected to the second feeding line, the second strip pattern extending in a second direction, that is an opposite to the first direction, from the one end thereof to the other end thereof, the third strip pattern has one end connected to both the other end terminals of the first and second capacitors of the capacitance coupling element and the other end connected to the ground pattern, the third strip pattern extending in a third direction, that crosses the first and second directions, from the one end thereof to the other end thereof, the capacitance coupling element is disposed with an offset toward the first direction from a central portion of the ground clearance region in a direction parallel to the first and second directions, and the first strip pattern is shorter in length than the second strip pattern. |
