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US 6,650,299 B2Granted
Antenna apparatus
AssigneeHitachi Cable, Ltd.
InventorsXin Zhang, Tsukasa Hiruta
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AssigneeHitachi Cable, Ltd.
InventorsXin Zhang, Tsukasa Hiruta
Estimating the term…
An antenna apparatus of the invention that consolidates a plurality of slot antennas offers a polarization diversity function and a simple construction of feed means, thereby attaining a small, sophisticated, highly efficient, and broadband-property antenna. The antenna apparatus has a pair of antenna elements 1 orthogonal to each other, the pair of antenna elements 1 being constituted by a slot 4 formed in a conductive plate 3 on a dielectric plate 2. The slot 4 has two linear portions 4c, 4d which extend straight with a predetermined width, a crossing 4a at which the two linear portions 4c, 4d cross orthogonal each other at the respective center in the longitudinal direction, and fan-shaped portions 4b that extend from the ends of each of the two linear portions 4c, 4d while expanding gradually than the width of the two linear portions 4c, 4d.
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,
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 is constituted by a slot having a shape such that two linear portions extending straight with a predetermined width cross at right angles, at the center in the longitudinal direction to each other at a position corresponding to a crossing, and a first feeder line forming an angle of +45° with respect to one linear portion and a second feeder line forming an angle of −45° with respect to said linear portion are provided along said dielectric plate so as to pass through said crossing of said two linear portions, respectively, and in the vicinity of said crossing, one 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, 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.
Dependencies are inferred from the claim text.