DIY Simple 5.8G FMCW Radar

Principle: The radar transmits a chirp signal with a bandwidth of Bw and a length of T, then

Thanks rotary tech provide components and CapableMachining for providing CNC machining of the relevant precision mechanical parts.

design pcb

finished PCBA

DEBUG

Transceiver test

practical testing:

The moving vehicles (oblique lines) can be clearly seen, but there are also a large number of static reflectors in the scene, which are not easy to see clearly. At the same time, it can also be seen that the effect of covering the rear scenery when the vehicle passes by. Stationary objects can be removed by filtering out echo components with a Doppler frequency close to zero.

Test parameters: center frequency 5.8G, sweep bandwidth 640MHz, effective bandwidth 384MHz (excluding the section where PLL is not locked at the beginning of sweep), pulse repetition frequency 1kHz. The baseband sampling rate is 10Msps.