Abstract: An antenna array is described which is suitable for use in a spatial location system comprising at least one of a transmitter and a receiver together with the antenna array wherein the antenna array is capable of varying the pointing angle of at least two antenna lobes independently without the need to move either the antenna array or its constituent parts physically and wherein the at least two antenna lobes are arranged such that they may partially intersect at one or more pointing angles under electronic control. The antenna array may, for example, comprise at least a first sub-array and at least a second sub-array wherein the second sub-array is oriented substantially orthogonally to the first sub-array and the first and second sub-array share at least one common antenna element.