Antenna unit stable in antenna characteristics and achievable in lengthening of life
AssigneeAlps Electric Co., Ltd.
InventorMasaru Shikata
Life of this patent
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Abstract
At least a part of mount pieces of a shield casing is arranged in locations adjacent to sides of a dielectric board to positionally restrain an antenna element. Therefore, even when torque with a feeding pin as an axis of rotation acts on the antenna element, the antenna element does not fluctuate in a direction of rotation, whereby stability in antenna characteristics is achieved to improve reliability, and stress such as torsion or the like acting on the feeding pin and its soldered portions is greatly decreased to enable achieving lengthening of life.
Claims3
An antenna unit including an antenna element comprising a patch electrode provided on a roof surface of a dielectric board, a circuit board provided on a bottom surface thereof with an amplifier and mounting the antenna element on a roof surface thereof, a shield casing mounted on the circuit board to cover the amplifier, and a feeding pin having one end thereof connected to the patch electrode and the other end thereof connected to the amplifier, the antenna unit characterized in that projecting pieces are provided on the shield casing to extend through the circuit board to be arranged in positions adjacent to sides of the dielectric board and the antenna element is positionally restrained relative to the cercuit board by the projecting pieces.
Dependencies are inferred from the claim text.