Automotive Radar

Modern automobiles are equipped with ingenious safety systems guided by a combination of stereo cameras, radar and proximity sensors. Radar is prevalent in safety, navigation and driver assistance systems thanks to its high precision and exceptional scalability. With proven EM simulators like ANSYS HFSS and SBR+, engineers can analyze radar system performance in complex, dynamic scenarios and improve the accuracy of their response to potential hazards. These simulations are critical in designing, testing and validating many aspects of radar systems.

Engineers can use ANSYS HFSS and SBR+ to design radar systems in the 24 GHz or 77 GHz radar bands. These systems can be used for functions like autonomous cruise control (ACC), collision avoidance, cross-traffic alerts, parking assistance, blind spot detection, pedestrian detection, emergency braking, etc.

As an example, HFSS and SBR+ enables engineers to create antennas for long-range radar systems working at 77 GHz based on finite element methods (FEM) and accelerated shooting and bouncing ray SBR methods.

HFSS and SBR+ are ideal tools to design high fidelity parametric antenna arrays and analyze their installed performance by mounting them on vehicle bumpers made of the latest and greatest materials. SBR+ uses ray tracing to model the array interaction with the vehicle and predict the installed antenna pattern. Strong vehicle scattering can cause antenna radiation pattern side-lobes to rise and multiply. Main beam shift, shape distortion, gain loss, depolarization and side-lobe levels — all these critical metrics in modeling the performance of a long-range radar can be analyzed and studied thoroughly in HFSS and SBR+.

After the installed antenna pattern has been computed, it can be used for higher-level simulations of dynamic driving environments. SBR+ enables large-scale, physics-based simulation of practical driving scenarios. Simulation results allow engineers to visualize radar response (e.g., Doppler-Range, Direction of Arrival, etc.) just as they would perform in the real world.

ANSYS HFSS and SBR+ are powerful tools for studying automotive radar systems with geometries ranging from sub-wavelength to thousands of wavelengths. ANSYS electromagnetic simulations empower companies to develop innovative, effective and reliable automotive radar systems. Advanced simulations from ANSYS HFSS and SBR+ can help companies meet the increasing demands for automation involving car radar systems.


  • Design parametric antenna arrays
  • Analyze installed antenna performance
  • Model radiation interaction with fascia
  • Predict scattering
  • Simulate driving scenarios
Installed Pattern