This paper reports the development of a low-cost 24GHz Doppler radar sensor for automotive applications. It exploits a DRO, SMT active components, low-cost substrates and no antenna circulator, leading to a very compact, simple and quite inexpensive system.
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介绍了完整的演示装置，并有照片，有兴趣可以浏览一下。
车用低成本24GHz多普勒雷达传感器: A Cost Driven 24GHz Doppler Radar Sensor.pdf
