A radio frequency detection device to detect RFID tags. A single double-loop RFID antenna, an RFID reader, connection cables, longitudinal conductive section bars and transverse conductive section bars which form a closed circuit. A transverse branch connecting the longitudinal section bars so as to form a double-loop circuit which is crossed by current and which provides an electromagnetic field able to detect, in three dimensions, RFID tags even on both sides of a single panel of antennas. The possibility of superimposing an RFID antenna, with other antennas with electromagnetic technology allows to obtain a hybrid gate with a simultaneous reading of RFID tags and electromagnetic tags or bars.