A radar comprising at least one transmit antenna consisting of N individual subarrays that are non-directional in at least one plane in transmission, and a receive antenna consisting of M individual subarrays, the transmissions of the subarrays are orthogonal to one another by virtue of their frequency separation and each transmission covers a sub-band of the same width ΔF/N, said corresponding sub-bands being separated from one another, the radar comprising: On the transmit antenna An individual subarray of the transmit antenna is connected to a waveform generator (31 i), At least one oscillator is connected to the N waveform generators (31 i) associated with the N individual subarrays, forming an assembly adapted to generate, for each of the individual subarrays, a waveform such that each of the individual subarrays transmits continuous or quasi-continuous signals according to a temporal and periodic pattern such that: • The transmission pattern covers a bandwidth ΔF for a given duration Tm, • The transmission pattern is made up of N mutually different sub-patterns, the duration of a pattern being equal to Tm/N, and covers a sub-band of the total frequency band ΔF, • The patterns transmitted by the different subarrays are deduced from one another by individual delays which are multiples of Tm/N, the N sub-patterns transmitted by the subarrays being different during each time interval of duration Tm/N, On the receive antenna Each of the M individual subarrays of the receive antenna is adapted to pick up the reflected signals obtained from the transmission of the N individual subarrays of the transmit antenna, The receive antenna comprising means adapted to perform a compression of the received signal in space and in time. On the transmit antenna An individual subarray of the transmit antenna is connected to a waveform generator (31 i), At least one oscillator is connected to the N waveform generators (31 i) associated with the N individual subarrays, forming an assembly adapted to generate, for each of the individual subarrays, a waveform such that each of the individual subarrays transmits continuous or quasi-continuous signals according to a temporal and periodic pattern such that: • The transmission pattern covers a bandwidth ΔF for a given duration Tm, • The transmission pattern is made up of N mutually different sub-patterns, the duration of a pattern being equal to Tm/N, and covers a sub-band of the total frequency band ΔF, • The patterns transmitted by the different subarrays are deduced from one another by individual delays which are multiples of Tm/N, the N sub-patterns transmitted by the subarrays being different during each time interval of duration Tm/N, • The transmission pattern covers a bandwidth ΔF for a given duration Tm, • The transmission pattern is made up of N mutually different sub-patterns, the duration of a pattern being equal to Tm/N, and covers a sub-band of the total frequency band ΔF, • The patterns transmitted by the different subarrays are deduced from one another by individual delays which are multiples of Tm/N, the N sub-patterns transmitted by the subarrays being different during each time interval of duration Tm/N, On the receive antenna Each of the M individual subarrays of the receive antenna is adapted to pick up the reflected signals obtained from the transmission of the N individual subarrays of the transmit antenna, The receive antenna comprising means adapted to perform a compression of the received signal in space and in time.