We discuss simulator units for calibrating across-the-road Doppler traffic radar transceivers used in enforcement of highway speed limits. Two units of very similar design were developed, one operating at K-band (24 GHz) and the other at Ka-band (35 GHz). The signal received from the radar transmitter is frequency-modulated at rates that correspond to the expected Doppler shift for approaching and receding vehicles travelling at speeds of 25 to 200 km/h. The modulated signal is subsequently retransmitted back to the radar receiver, which demodulates it and then displays the simulated speed . The required calibration accuracy is 1.6 km/h at 90 km/h.
Proceedings Title: MICROWAVE & RADAR WEEK IN POLAND
Conference Dates: May 17-19, 2004
Conference Location: Warsaw, PL
Pub Type: Conferences
Calibration, Doppler, radar, speed measurement, traffic