Frequency-Beam-Scanning mm-Wave Antennas for Direction Finding RADAR

We propose a new type of compact planar Leaky-Wave Antennas (LWA) for mm-wave direction finding RADAR systems. The antennas are based on the Substrate Integrated Waveguide (SIW) leaky-wave technology which combines low profile and simple feeding with frequency scanning capability. Theoretical results show the flexibility of the design to adapt to different frequency ranges in the 60 GHz band. This is possible by just changing the dielectric material used for the SIW substrate. Designs with different angular Field-of-View (FoV) and frequency ranges are presented along with an example of signal-processing for Direction-of-Arrival (DoA) estimation.