Vehicular traffic sensor

G - Physics – 01 – S

Patent

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Details

G01S 13/91 (2006.01) G01S 7/02 (2006.01) G01S 13/04 (2006.01) G08G 1/01 (2006.01) H01Q 1/36 (2006.01) H01Q 21/00 (2006.01)

Patent

CA 2461411

A vehicle traffic sensor for detecting and monitoring vehicular targets includes a sensor (500) that employs a planar design resulting in a reduced profile sensor. The sensor (500) includes a multi-layer radio frequency board (520) with RF components (522) on one of the sides and both isolation and planar array antennas (526) on the opposing side (528). The antennas (526) are preferably tapered planar array antennas that include one transmit antenna and one receive antenna. The sensor (500) also includes at least one logic or signal processing board (530) populated with components (534) on a first side (532) and a ground plane (538) on a second side positioned toward the RF components (522) of the RF board (520) to form an RF shield. The boards are housed within a housing (502) that is permeable, at least on the side through which the antenna structures propagate.

L'invention porte sur un analyseur de trafic détectant et suivant les véhicules et comportant un détecteur (500) plat à profil réduit. Le détecteur (500) consiste en une carte RF multicouche (520) dont les composants RF (522) sont disposés d'un côté, et une isolation et des antennes (526) à réseau plan, de l'autre. Lesdites antennes (526), de préférence trapézoïdales, sont l'une émettrice et l'autre réceptrice. Le détecteur (500) comporte également au moins une carte (530) logique ou de traitement des signaux dont les composants (534) sont disposés d'un premier côté (532), et un plan de terre (538), de l'autre, lequel, placé face aux composants RF (522) de la carte RF (520), sert de blindage RF. Les cartes sont disposées dans un logement (502), perméable sur au moins l'un de ses côtés aux propagations des structures d'antennes.

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