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'Across-the-Road Photo Traffic Radars: New Calibration Techniques'
Published
Author(s)
Claude Weil, Dennis G. Camell, David R. Novotny, Robert T. Johnk
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.
Weil, C.
, Camell, D.
, Novotny, D.
and Johnk, R.
(2004),
'Across-the-Road Photo Traffic Radars: New Calibration Techniques', MICROWAVE & RADAR WEEK IN POLAND, Warsaw, 1, PL
(Accessed October 14, 2025)