Resonant aerials with feed intermediate between the extremities of the aerial, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength The present invention relates to hardened antennas and particularly to a buried antenna capable of withstanding nuclear blasts or the like. It is an object to provide an antenna which presents a small target cross section and which has an optimum launching efficiency relative to its cost. Another object is to provide a buried antenna which radiates a vertical polarized field above ground. It is another object provides an efficient buried antenna having a subs-tantially omnidirectional radiation pattern. It is another object to provide a buried antenna whose efficiency is not impaired by subsurface and surface water.