Improved baseband subsystem of the wideband FMCW educational radar

This paper presents the progress made on the previous work of designing and realizing a low-cost frequency-modulated continuous wave (FMCW) radar system. While maintaining the modularity, flexibility, and general architecture of the previous system, some modifications are made mostly in the baseband section of the radar. An indoor ranging experiment is done to show the performance of the modified system. The radar is tuned to operate from 2.308–2.675 GHz to maintain the frequency linearity of the generated chirp. It is shown that the system is capable to detect object up to 25 m with range resolution around 0.4 m.