Omnidirectional dipole loop antenna array

An aerial comprising four substantially identical folded dipole elements each element defining a free-standing loop lying in a plane parallel to a common central axis which, in use, is intended to be vertical, the planes of all of said loops being equally spaced from said central axis and the planes of adjacent ones of said loops being relatively angularly displaced by 90.degree. about said central axis such that said dipole elements are arranged in mutually facing pairs disposed on opposite sides of said central axis, all of said dipole elements being connected in common whereby the polar response of said aerial is substantially circular about said axis, characterised in that each folded dipole element consists of a single open ended loop of which the ends are spaced apart in the respective plane in a direction parallel to the said central axis, and that the respective ends of each loop are coupled to common terminal means by means of twin feeders extending from said ends of the loop parallel to one another and radially towards said central axis.