Broadband antenna using semicircular radiator

摘要

An antenna comprises a first radiator shaped as a semicircular arc and formed by a virtually semicircular conductor disc having a virtually semicircular notch concentrically therewith; a plane conductor ground plate disposed opposed to the semicircular arc of said first radiator at right angles thereto; and a feeder connected to the vertex of the semicircular arc of said first radiator and said plane conductor ground plate, for feeding power to them.