Abstract: A circle arc array of element antennas is capable of receiving at all times radio signals from a source located anywhere in a wide angle or complete circle of azimuth directions, the direction of arrival of a received signal being indicated by radio receiving equipment. The source signal received by each element antenna is directed into two or three channels having different phase delays. The output signals from the first channels of all of the element antennas are combined and connected to a first radio receiver, the phase delays in the first channels being equal for all of the element antennas. The output signals from the second channels of all of the element antennas are combined and connected to the input of a second receiver, the phase delays in the second channels all being different from each other in a uniform phase progression. The phase progression corresponds to a clockwise azimuthal progression of the associated element antennas.