Detector for acousto-magnetic product security label and radio frequency product security label has both antennas in fixtures installed at exit of protected area

摘要

The antenna fixtures installed at the exit of a protected area contain transmitting antennas for an acousto-magnetic (AM) and radio frequency (RF) system, and the receiving antennas for the AM and RF systems. The transmitting and the receiving antennas may be combined in a transceiver system, the antenna fixtures containing the AM transceiver antenna and the RF transceiver antenna.