Introduction FMCW and pulse radar architectures. I have previously made several FMCW radars that have worked well. FMCW (Frequency Modulated Continuous Wave) radar is quite easy and cheap to make. It uses separate transmit and receive antennas, which avoids the need for switching between receiving and transmitting. It mixes the received signal with the transmitted signal, resulting in a low output frequency, making it possible to use low-speed analog-to-digital converter (ADC). However, big, ser...