Abstract: In a holographic radar having receivers (10) for amplifying, detecting, and A/D-converting the RF signals in all range bins received by antenna elements (1) and a digital beamformer (11) for performing digital operations on the outputs of these receivers to generate a number of beams equal to the number of antenna elements, three or four antenna arrays (D0 to D3), each array (2) being formed of a plurality of antenna elements (1), are oriented in different directions to provide 360.degree. coverage and switches (12) are provided to switch the connection between the antenna elements (1) and the receivers (10) according to pulse hit numbers and range bin numbers. Thus high-speed 360.degree. scan coverage can be attained with a small, inexpensive apparatus requiring as many receivers, memory elements and a digital beam former as needed for a single antenna array.