Abstract: The present invention refers to apparatus intended to suppress multiple co-channel interference and reflections from desired stations. The outputs of a two antenna array, which has been directed at the desired station, are fed to a sum-and-difference hybrid. The outputs of the hybrid are adjusted in amplitude and phase and combined to null the interference signal. The phase shift required for nulling is either .+-.90.degree.. The sign is determined by the side of the array on which the interference source is located. The phase relation is true regardless of the exact location of the interference, requiring only a single adjustment in amplitude to null the source of interference.By adding a third antenna to the array and a phase detector to the system, a signal representing the direction of the source of interference is produced and is used to introduce either a .+-.90.degree.