Master thesis defence

Multiple-input Multiple-output Grating Lobe Selection Scheme for Radar Applications

Nick Cancrinus

For radar applications, MIMO is often used. The problem is that the amount of available transmit- and receive channels is limited. For most MIMO systems, every channel is connected to a single antenna element. This means that the effective aperture is small, and therefore the directivity is limited. To circumvent this problem, a grating-lobe selection scheme is proposed. Using beamforming networks, the receive channels are connected to antenna beam patterns that have grating lobes. The transmit channels are connected to antenna beams that select different grating lobes of the receive beams. The result is an array that covers a reduced part of the visible space, with discrete beams that have improved directivity.