Webinar: Simulating The Installed Performance Of Automotive Radars

Automotive radars must operate in complex and dynamic environments where interactions with the host vehicle and its surroundings can have a significant impact on the performance of the radar system. In particular, the material properties of the vehicle fascia and the location of the radar behind the fascia can impact performance. Radar designers and system integrators also need to understand how the radar will perform under varying traffic and weather conditions. As automotive radar systems mature, it is important to understand complex scattering mechanisms in different environments and for different objects encountered on the road.

In this presentation, the Delcross Savant and the ANSYS HFSS software tools will be used to assess the performance of an automotive radar behind various fascia designs. HFSS will be used to compute fields over a Huygens surface (near-field box) that encloses a representative automotive radar. The fields computed by HFSS will be used in Savant as the antenna source. Savant employs the Shooting and Bouncing Rays (SBR) technique to simulate the impact of the fascia on the performance of the radar. With this hybrid approach, the strengths of the HFSS (full-wave) and Savant (asymptotic) tools are leveraged to rapidly and accurately assess the impact of the fascia on the performance of the automotive radar.

It will also be shown how Savant simulations along with suitable post-processing can be used to predict the Range/Doppler response of an automotive radar in a realistic scene including the effects of rough surface scattering (e.g., road surface) and scattering from an oncoming vehicle. Installed antenna patterns generated from the Savant/HFSS hybrid approach capture changes in the radar performance due to interactions with the vehicle fascia. The installed patterns generated from the hybrid solution are used in the scene modeling context to capture interactions with the surrounding environment.

The combined solution of Delcross Savant and ANSYS HFSS is a powerful methodology for studying automotive radar problems with geometry scale ranging from sub-wavelength to thousands of wavelengths providing the ability to solve what were previously intractable problems.

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