Patent ID: 7095384

Claim:
An array antenna comprising: a substrate; a plurality of antenna elements formed on a surface of the substrate in such a way that the antenna elements are arranged generally in a straight line; a plurality of secondary feeder lines individually connected to the antenna elements on sides thereof which are perpendicular to an arraying direction of the antenna elements; a primary feeder line to which the individual secondary feeder lines are connected parallel to one another; and a phase-inverting distributor inserted in the primary feeder line in an area located halfway along the length of the primary feeder line; wherein the sides of the antenna elements connected to the individual secondary feeder lines face a reference line which passes through the phase-inverting distributor perpendicular to the arraying direction of the antenna elements; and wherein the antenna elements are symmetrically arranged with respect to said reference line, and at least one of element-to-element intervals differs from the others.