Foreign object debris detection using a 78 GHz sensor with cosec antenna

This paper presents the results of FOD measurements conducted using a broadband 78 GHz radar sensor. Previous studies with a short-range setup up to 30 m showed promising results. However, to meet the requirements of the intended application, the range has to be increased significantly. As for all radar systems, the range can be extended by increasing the transmitted power and/or the antenna gain. In this work two different folded reflectarray antennas with a cosec-shaped pattern have been used to improve the system performance and range. Together with a CFAR (constant false alarm rate) algorithm and a moving target indication advances could be achieved compared to the previous setup.