DEVICE FOR MONITORING TRANSMISSION ANTENNAE OF ELECTROMAGNETIC DETECTION SYSTEMS

摘要

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.