Automotive Radar Sensor Design and Placement
Design requirements for 24 GHz and 77 GHz automotive radar sensors are becoming more stringent as consumers increase demand for applications like blind spot detection (BSD) and lane change assistance (LCA). In turn, the engineering departments at Tier 1 suppliers like Delphi, Autoliv, and Continental are advancing technology in order to win bids from OEMs like BMW, Audi, and Chrysler.
Types of Analysis
Remcom’s time-domain electromagnetic simulation software, XFdtd, is a proven tool that promotes the rapid development of automotive radar sensors. Using simulation, RF and Application Engineers are able to analyze the far-field radiation characteristics of their antenna which minimizes the number of prototypes built and tested in a lab. This applies to the following:
- Designing the layout of the feeding structure and radiating elements on a multi-layer RF board.
- Determining a matching radome while accounting for all the complexities in a full sensor model: RF board, radome, packaging, data connector, case, etc.
- Finding or troubleshooting the placement of a sensor behind fascia.
This paper demonstrates how XF's time-domain EM simulation enables rapid development by allowing engineers to determine the performance of a fully detailed sensor model installed behind a piece of fascia. A 25 GHz sensor frames the discussion.
To meet the increasing accuracy needs of high performance automotive radar design work, the FDTD EM simulation method has emerged as a better solution than traditional FEM formulations. This paper introduces FDTD’s advantages for automotive radar circuit and systems level designers.
A convex dielectric lens, designed for 77 GHz, is compared against a similar plano-convex lens using XF7.