202121 Sep

Radar Modelling - Reflection of an EM wave


Radar sensors are a key component to the current and future technologies of ADAS (Advanced Driver-Assistance Systems) and AV (Autonomous Vehicle). They are cheap and mature technologies that can operate under any weather conditions, and when coupled with lidars or cameras, they allow a complete and precise mapping of the environment. In other words, it follows the principle of Fermat that states that light follows the shortest path (straight line in an homogeneous media). Modified from BSDF: BRDF + BTDF by Jurohi licensed under CC-BY-SA 3.0 There are 2 phenomena that need to be taken into account to model what happens when a wave hits a continuous surface : The magnitude of these reflections are dependent on the magnitude of the incident wave, but also the wavelength, incident angle, polarization and material properties. When integrated in a complete simulation taking into account the propagation losses, the antenna characteristics and a model of the car’s environment, radar data can be accurately generated and processed.

Source: Claytex