A positioning system operable to enable determination of a position of a remote RF receiver, the system comprising: a common generating and switching unit; and an antenna array of at least two spaced-apart antennas (120, 130, 150, 170), wherein a distance between the spaced-apart antennas is known, said antenna array being coupled to the common generating and switching unit, said generating and switching unit being configured to generate a periodic signal S and to switch the periodic signal S between said at least two antennas of said antenna array, wherein Δt is a time delay between portions of the periodic signal S emitted by the spaced-apart antennas, wherein a remote RF receiver is capable to receive said periodic signal S and a phase difference estimator is capable to measure a phase difference φ between portions of said periodic signal S having the same frequency, said phase difference at least being indicative of a surface, wherein the surface includes at least one cone, and the remote RF receiver is located on the at least one cone, and wherein the angle α of the at least one cone is defined based on the respective frequency of said periodic signal S, as detected by the remote RF receiver, the phase difference φ and integer number N of cycles of said periodic signal S corresponding to the difference ΔR in travel distance from the antennas, the time delay Δt between the portions of the periodic signal S, and the known distance between the antennas, the system is characterized in that said generating and switching unit is configured to generate said periodic signal S including signal portions having a first frequency f 1 and signal portions having a second frequency f 2, and to switch the signal between the at least two antennas such that the signal portions of the first frequency are switched between the at least two spaced-apart antennas and are followed by signal portions of the second frequency, which are switched between the at least two spaced-apart antennas, wherein said phase difference estimator is capable of measuring said phase difference as a first phase difference between signal portions of said first frequency f 1 and a second phase difference between signal portions of said second frequency f 2, wherein N is determined using the first and second phase differences. a common generating and switching unit; and an antenna array of at least two spaced-apart antennas (120, 130, 150, 170), wherein a distance between the spaced-apart antennas is known, said antenna array being coupled to the common generating and switching unit, said generating and switching unit being configured to generate a periodic signal S and to switch the periodic signal S between said at least two antennas of said antenna array, wherein Δt is a time delay between portions of the periodic signal S emitted by the spaced-apart antennas, wherein a remote RF receiver is capable to receive said periodic signal S and a phase difference estimator is capable to measure a phase difference φ between portions of said periodic signal S having the same frequency, said phase difference at least being indicative of a surface, wherein the surface includes at least one cone, and the remote RF receiver is located on the at least one cone, and wherein the angle α of the at least one cone is defined based on the respective frequency of said periodic signal S, as detected by the remote RF receiver, the phase difference φ and integer number N of cycles of said periodic signal S corresponding to the difference ΔR in travel distance from the antennas, the time delay Δt between the portions of the periodic signal S, and the known distance between the antennas, the system is characterized in that said generating and switching unit is configured to generate said periodic signal S including signal portions having a first frequency f 1 and signal portions having a second frequency f 2, and to switch the signal between the at least two antennas such that the signal portions of the first frequency are switched between the at least two spaced-apart antennas and are followed by signal portions of the second frequency, which are switched between the at least two spaced-apart antennas, wherein said phase difference estimator is capable of measuring said phase difference as a first phase difference between signal portions of said first frequency f 1 and a second phase difference between signal portions of said second frequency f 2, wherein N is determined using the first and second phase differences.