Active transponders for short-range communications between on- board units and roadside units

C. Luxey (1) , L. Dussopt (1) , Jean-Marc Laheurte (1)

1 LEAT - Laboratoire d'Electronique, Antennes et Télécommunications

An RF transponder is a system allowing contactless identification or communication in applications ranging from mountain/sea rescue to automatic waste management. Such a system is woken by an interrogating signal and sends back a coded response. A potential application in Intelligent Transport Systems concerns dedicated short-range communications (DSRC), in which information is exchanged between roadside units and on-board transponders. The European pre-standard defining the framework for DSRC recommends a 5.8 GHz carrier frequency within a 10 MHz band. Since the communication distance extends from a few meters (vehicle tolling applications) to several tens of meters (traffic information), a small primary battery must be inserted in the transponder. The purpose of this paper is to present two transponders suitable for this specific application, both based on the locking of a local oscillator by a pure interrogating RF frequency.

Mots clés: transponders; active transponders; short-range communications; on-board units; roadside units; RF transponder; Intelligent Transport Systems; dedicated short-range communications; European pre-standard; DSRC; communication distance; vehicle tolling applications; traffic information; locking; local oscillator; interrogating RF frequency; 5.8 GHz; 10 MHz

Domaines: Electromagnétisme

C. Luxey, L. Dussopt, Jean-Marc Laheurte. Active transponders for short-range communications between on- board units and roadside units. IEE Colloquium on Antennas for Automotive Applications, Mar 2000, Londres, United Kingdom. pp.5/1-5/5, ⟨10.1049/ic:20000005⟩. ⟨hal-00983148⟩