The AP61 microwave sensor is a K-band transceiver 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 transceiver is cost effective for mid-range speed detection, motion detection and ranging applications. It is suitable for applications in traffic monitoring, speed measurement, security, lighting control and sports training.