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Across-the-road photo traffic radars: new calibration techniques

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4 Author(s)
Weil, C.M. ; Div. of Electromagn., Nat. Inst. of Stand. & Technol., Boulder, CO, USA ; Camell, D. ; Novotny, D.R. ; Johnk, R.T.

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.

Published in:

Microwaves, Radar and Wireless Communications, 2004. MIKON-2004. 15th International Conference on  (Volume:3 )

Date of Conference:

17-19 May 2004