Research on Joint Interference Suppression Strategy for Vehicle-Mounted Millimeter-Wave Radar

In response to the issue of mutual interference among vehicle-mounted millimeter wave radars, this paper studies the widely used Frequency Modulated Continuous Wave (FMCW) radar. Firstly, a mathematical model of the working mechanism of FMCW radar is established, analyzing the interference mechanism of signals between FMCW radars from the perspectives of power level and signal waveform. Combining relevant research from domestic and international scholars, a joint interference suppression strategy is proposed, and three practical scenarios—following a vehicle, meeting another vehicle, and an intersection—are selected for validation. Finally, a microstrip antenna for the 77GHz frequency band of millimeter wave radar was designed according to actual requirements, and its beam scanning and low sidelobe weighting methods were verified.