I happen to know some related experiments and tests about RCS done abroad. Based on the principle that all dry goods will be shared, I simply spread the seeds of knowledge so as to sprout and grow in more places. This is also a little boost to the industry. A little, but it doesn't hurt not to promote it.
The model parameters needed to establish the target model include RCS (radar cross section). In [1-4], the RCS of 76GHz is studied.
When the target is close to the radar, only a small part of the vehicle is covered by the radar beam, and the RCS will change constantly. Therefore, for vehicles, the RCS value will be more stable only if the distance from the radar is large enough and the radar beam fully covers the vehicle.
Therefore, for different targets, we can get their RCS according to frequency, horizontal azimuth and distance. In this paper, the RCS values used for pedestrian and motorcycle target modeling are-10dBsm and 7dBsm respectively. For two big targets, cars and trucks, RCS values are modeled by using distance. When the carrier frequency is set to 76.5GHz and the horizontal azimuth angle is 0 degrees, in order to obtain an experimental formula for calculating RCS, an antenna with a beam width of 5 degrees is used below, and the distance between the target and the radar is R. When R changes, the RCS calculation formula of cars and trucks can be obtained as follows.
The following figure shows the RCS diagrams of these four target models, and gives the RCS values of these target models in [1-4] at 76GHz. The difference of RCS values between these target models may be caused by the fact that the specific antenna beam angle width is not given in these articles.
Title: The Great Leap Forward, 1956, from Weng Yizhi.