FIELD: physics.
SUBSTANCE: invention discloses an electronic article surveillance (EAS) reader which has a master oscillator, a transmitter which is functionally connected to the master oscillator through a first signal valve; a transmitter antenna functionally connected to the input of a receiver cascade; and a signal detector. The input cascade of the receiver is functionally connected to the signal detector through a second signal valve, where the master oscillator generates a pulse of electromagnetic energy in form of a pulse or continuous wave at operating frequency of the radio frequency identification (RFID) tag in the reading region of the EAS-reader such that the energy level of the pulse forms a residual or direct call signal from the RFID -tag, which indicates presence of a RFID-tag without activation of RED functions of the tag. Direct call signal is read as EAS-tag by EAS-reader.
EFFECT: improved method.
13 cl, 9 dwg, 1 tbl
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Authors
Dates
2010-09-27—Published
2005-11-18—Filed