Patent ID: 7289070

Claim:
An antenna apparatus, comprising: a ground plate that is disposed on a printed wiring board; a feeding unit that extends from the ground plate at a predetermined angle in reference to the ground plate for a predetermined length, in a direction that perpendicularly intersects the ground plate; and a radio frequency circuit unit disposed on the printed wiring board and connected to the feeding unit by a microstrip line; wherein the feeding unit is shaped like a semicircle plate extending from one end of the ground plate in the direction that perpendicularly intersects the ground plate for the predetermined length and a top part of a curved surface of the feeding unit is connected to the microstrip line, wherein the ground plate is formed by electrically conductive patterns disposed along and at both sides of the microstrip line, and wherein the feeding unit is capable of rotational movement about at least two axes, a first axis being parallel to the ground plate and a second axis being perpendicular to the ground plate.