The AP61-0 K-band microwave sensor belongs to the AP6 series suitable for CW, FSK or FMCW operation. It consists of a HEMT oscillator, single balanced mixers and bi-static microstrip patch antenna arrays. Integrated with a low noise amplifier (LNA), the AP61-0 transceiver is cost effective for mid-range speed detection and ranging applications. With integrated IF amplifiers specific for speed detection between 7 km/hr to 3000 km/hr, it can easily integrate into applications such as traffic monitoring, speed measurement and sports training.