There are linear one-dimensional scanning antennas available for 77 GHz and planar two dimensional antennas for 38 GHz. The 77 GHz antenna scans a range of 15 degrees, and it is possible to double the figure by double feed. This requires a more complex control strategy to synchronize the two antennas. Spinning grating antennas are capable of providing fast linear scan while requiring only continuos speed rotation. They are characterized for very low cost and simple design.
Current applications are automotive collision avoidance and aircraft autonomous landing systems.
This technology uses one moving part for one axis scanning. This evidence is integrated into a grid if cells, so the certainty of emptiness or occupancy grows with the number of observations. The ongoing development of the radar beam model pursues the application of this technique to radar beams. The technique has the potential to sharpen the images and correct for erroneous side lobe information. The field experiments with the FMCW imaging radar will provide the information to build the sensor model and apply this technique to real scenes.