Patent ID: 9653791
Date: 2017-05-16
CPC Classifications: H01Q

Claim:
1. An antenna device, comprising: a substrate; a first antenna element disposed on a surface of the substrate, the first antenna element having predetermined antenna characteristics over a certain band, the first antenna element being configured to operate as a wideband antenna and being tilted toward the substrate; a second antenna element disposed on the surface of the substrate, the second antenna element being configured to have a linear shape, a length of the second antenna element being shorter than twice a length of a side that determines a lowest operating frequency of the first antenna element; a grounding conductor disposed at a predetermined depth from the surface of the substrate so as not to overlap with the first antenna element and the second antenna element; a feeder wire disposed on the surface of the substrate, the feeder wire being coupled to a feeding point provided in the first antenna element; a first switch and a second switch disposed at the feeder wire at predetermined distances from the feeding point; a first matching element disposed between the feeder wire and the grounding conductor, the first matching element being coupled to the feeder wire in parallel when the first switch is turned to a conductive state; a second matching element disposed between the feeder wire and the grounding conductor, the second matching element being coupled to the feeder wire in parallel when the second switch is turned to a conductive state; and a third switch configured to switch connecting states of the first antenna element and the second antenna element, wherein the first antenna element includes: a fan-shaped portion including a curved side and configured to be disposed in contact with the surface of the substrate, a bent portion configured to be in contact with the fan-shaped portion, the bent portion being a portion where the first antenna element is bent substantially vertically upward from the surface of the substrate, and a triangular portion coupled to the bent portion; and wherein the first antenna element is bent so as not to protrude outside the surface of the substrate.