Patent ID: 9190721
Filing Date: 2015-11-17
Classification: H01Q

Abstract:
1. An antenna device comprising: an insulating substrate main body; and a ground pattern, a first element, a second element, and a third element each of which is patterned with metal foil on the substrate main body, wherein the ground pattern has a linear, uni-directional shape and extends in one direction while being connectable to a ground at the base end side, the first element extends such that a feed point is provided at the base end which is arranged near the base end side of the ground pattern, a first passive element is connected at an intermediate portion which is arranged along the ground pattern, and a first antenna element of a dielectric antenna is provided closer to the tip end side than the first passive element, the second element extends such that the base end thereof is connected to the base end side of the ground pattern and the tip end thereof is connected to the intermediate portion provided closer to the base end side than the first passive element of the first element, the third element extends such that the base end thereof is connected closer to the base end side than the first passive element of the first element and a second passive element is connected at an intermediate point, the first element extends with a gap provided between the first element and each of the second element, the third element, and the ground pattern so as to be able to generate a stray capacitance between the first element and the second element, a stray capacitance between the first element and the third element, and a stray capacitance between the first element and the ground pattern, and the ground pattern extends such that the tip end thereof is provided within a range from a position facing the connecting part between the first element and the second element to a position facing the first passive element.