Patent ID: 6650299
Filing Date: 2003-11-18
Classification: H01Q

Abstract:
An antenna apparatus comprising a pair of antenna elements constituted by forming a slot on a conductive plate overlapped on a dielectric plate, wherein the pair of antenna elements are orthogonal to each other and are constituted by a slot having a crossing at which two linear portions extending straight with a predetermined width cross at right angles, at the center in the longitudinal direction to each other, and having fan-shaped portions at opposite ends of each linear portion, the fan-shaped portions having a width greater than the predetermined width of the linear portion,wherein a first feeder line forming an angle of +45Â° with respect to one linear portion and a second feeder line forming an angle of âˆ’45Â° with respect to said linear portion are provided along said dielectric plate so as to pass through said crossing, respectively, and in the vicinity of said crossing, the first feeder line is arranged on one face of said dielectric plate and is divided into a first divided feeder line and a second divided feeder line at a position corresponding to the crossing with a gap separating the first and second divided feeder lines, and the second feeder line passes between the first and second divided feeder lines in the gap and is arranged on the opposite face of said dielectric plate.