| Author(s): |
Claude Weil; Dennis G. Camell; David R. Novotny; Robert T. Johnk; |
| Title: |
'Across-the-Road Photo Traffic Radars: New Calibration Techniques' |
| Published: |
May 17, 2004 |
| Abstract: |
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: |
MICROWAVE & RADAR WEEK IN POLAND |
| Location: |
Warsaw, PL |
| Dates: |
May 17-19, 2004 |
| Keywords: |
Calibration;Doppler;radar;speed measurement;traffic |
| Research Areas: |
Electromagnetics |
