Patent ID: 6424298
Filing Date: 2002-07-23
Classification: H01Q

Abstract:
A microstrip array antenna comprising:a dielectric substrate; a strip conductor formed on a top face of said dielectric substrate; and a ground plate formed on a reverse face of said dielectric substrate, wherein said strip conductor comprises a straight feeder strip, and a plurality of parallel radiation antenna elements disposed along at least one side of the feeder strip at a predetermined angle relative to the feeder strip and a predetermined pitch, each of said radiation antenna elements having an electric field radiation edge which is not parallel to the longitudinal direction of said feeder strip, said radiation antenna elements dimensioned so that the combination of said radiation antenna elements receives or transmits a linearly polarized electromagnetic wave whose electric field is oriented along a same length of each of said radiation antenna elements, each of said radiation antenna elements has a rectangular shape, a length approximately equal to an integral number multiplied by a half wavelength of the electromagnetic wave which propagates along said feeder strip at a predetermined operated frequency, and a width different from the length and determined according to excitation amplitude of respective radiation antenna elements, said excitation amplitude being determined so as to provide a desired directivity, and is connected to said feeder strip substantially at a comer of said rectangular antenna element.