Detection system for detecting resonance effects of a label in a frequency-swept interrogation field by means of single sideband demodulation and method for carrying out such detection.

摘要

A detection system for detecting or identifying a label comprising at least one resonant circuit. The system comprises a transmitter unit for generating a frequency-swept electromagnetic interrogation field and a detection unit for detecting resonance effects caused by a label located in the interrogation field. According to the invention the detection unit comprises a transmitter unit which detects signals coming from just one label frequency sideband of the instantaneous frequency of the interrogation field for detecting resonance effects which occur at least substantially in one sideband of a resonant frequency of the label. <IMAGE>