The imaging mode of forward looking SAR with two receiving antennas

Compared to side looking synthetic aperture radar (SAR), forward looking SAR is known to have the disadvantage of the left/right ambiguity problem and the difficulty to achieve high angular resolution (azimuth resolution). This paper considers a radar platform with two or more receiving antennas and one transmitting antenna. In this operation mode, it will be seen that the left/right ambiguity problem can be solved in theory. High angular (azimuth) resolution can be achieved through a long illumination time. The imaging modes, azimuth resolution and the reference matching filter function are analyzed.