Device for monitoring transmission antennae of...

H - Electricity – 01 – Q

Patent

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Details

H01Q 7/04 (2006.01) H01Q 7/00 (2006.01)

Patent

CA 2470160

The invention concerns electromagnetic detection systems designed to detect stolen objects, and comprising at least a transmission antenna and at least a reception antenna, the or each transmission antenna being powered by a power amplifier. The device consists of: at least a transmission antenna (4) proper, not frequency-tuned, at least an on/off simplified power amplifier (6) of H-bridge or half-bridge or quarter-bridge type, the transmission antenna element (4) being directly coupled to said amplifier (6), and at least an electronic powering circuit, whereof the output is connected to the amplifier.

Ce dispositif concerne les systèmes de détection électromagnétiques adaptés ô la détection d'objets volés, et comprenant au moins une antenne d'émission et au moins une antenne de réception, la ou chaque antenne d'émission étant alimentée par un amplificateur de puissance. Le dispositif se compose:- d'au moins un élément d'antenne d'émission (4) proprement dit, non accordé en fréquence,- d'au moins un amplificateur de puissance (6) simplifié, fonctionnant en "tout ou rien", du genre "pont en H" ou "demi-pont" ou "quart de pont", l'élément d'antenne d'émission (4) étant couplé directement ô cet amplificateur (6), et - d'au moins un circuit électronique d'alimentation, dont la sortie est connectée ô l'amplificateur (6).

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