Antenna

A printed circuit radiating element 20 comprises a geometrically symmetric planar area of a conducting material separated from a ground plane by a dielectric medium. The driving point of the radiating element is at the base 24 of a notch 26 in one side thereof so that the driving impedance is reduced from that obtained when the element is driven at its edge. Symmetrically disposed on opposite sides of an axis of symmetry 38 of the element along which the driving point lies are two notches 32, 46 which restore the electrical symmetry of the radiating element thereby to suppress higher order modes. This results in a radiation pattern with minimal cross-polarized energy in the principal planes and high port-to-port isolation. Two driving points may be employed to produce a dual linearly polarized antenna and a reactive combiner or hybrid may be employed to obtain circularly-polarized radiations. The radiating element may be square, rectangular or circular. A plurality of radiating elements may be interconnected to form an array.