Etinger Ariel, Litvak Boris, Pinhasi Yosef
Faculty of Engineering, Ariel University, Ariel 40700, Israel.
Sensors (Basel). 2017 Aug 30;17(9):1983. doi: 10.3390/s17091983.
A quasi-optical multi-ray model for a short-range millimeter wave radar is presented. The model considers multi-path effects emerging while multiple rays are scattered from the target and reflected to the radar receiver. Among the examined scenarios, the special case of grazing ground reflections is analyzed. Such a case becomes relevant when short range anti-collision radars are employed in vehicles. Such radars operate at millimeter wavelengths, and are aimed at the detection of targets located several tens of meters from the transmitter. Reflections from the road are expected to play a role in the received signal strength, together with the direct line-of-sight beams illuminated and scattered from the target. The model is demonstrated experimentally using radar operating in the W-band. Controlled measurements were done to distinguish between several scattering target features. The experimental setup was designed to imitate vehicle near-ground millimeter wave radars operating in vehicles. A comparison between analytical calculations and experimental results is made and discussed.
提出了一种用于短程毫米波雷达的准光学多射线模型。该模型考虑了多条射线从目标散射并反射回雷达接收器时出现的多径效应。在所研究的场景中，分析了掠地反射的特殊情况。当车辆中使用短程防撞雷达时，这种情况就变得很重要。此类雷达工作在毫米波波长，旨在探测距离发射器几十米处的目标。预计来自道路的反射会与从目标照射和散射的直接视线波束一起，对接收信号强度产生影响。使用工作在W波段的雷达对该模型进行了实验验证。进行了控制测量以区分几种散射目标特征。实验装置旨在模拟车辆中运行的近地毫米波雷达。对分析计算结果与实验结果进行了比较和讨论。
