PHASED ARRAY ANTENNA HAVING THE HIGHEST EFFICIENCY AT SLANT ANGLE

摘要

The present invention relates to a phased array antenna, which is configured such that a plurality of radiation elements, having high reception efficiency for radio waves incident at a tilt angle, is arranged in a plurality of rows and columns, thus attaining high reception efficiency, and which adjusts radio waves, incident through a radome for protecting the antenna, to a desired tilt angle, thus further increasing radio wave reception efficiency. For this purpose, the present invention includes a printed circuit board provided with a plurality of electrical and electronic devices for processing radio waves received from a satellite; and a plurality of radiation elements arranged and mounted on the printed circuit board in a plurality of rows and columns, formed such that the radiation characteristic for the received radio waves is maximized at the tilt angle, and formed in a helical or monopolar form to be optimized for the radio waves received at the tilt angle. Furthermore, the present invention is configured such that a radome through which the radio waves pass is installed outside the printed circuit board on which the radiation elements are mounted, wherein, in order to allow radio waves, passing through and refracted, to be converged at the tilt angle at which the reception efficiency of the radiation elements is maximized, an uneven surface is formed on the inner or outer surface of the radome. Furthermore, in order to allow the radio waves, passing through and refracted, to be maintained at the tilt angle at which the reception efficiency of the radiation elements is maximized, the radome includes a sidewall member provided on the sides of the printed circuit board, and a cover member configured to be connected to the upper portions of the sidewall member and to be lifted and lowered upward and downward from the sidewall member, wherein a lifting drive unit for selectively lifting and lowering the cover member is installed on the sidewall member and the cover unit.