A method and apparatus for identifying a location of a radio-frequency identification tag. A hand-held locator device is configured to transmit a first signal and a second signal. A frequency of the first signal changes through a first range of frequencies and is transmitted in a range of directions corresponding to the first range of frequencies. A frequency of the second signal changes through a second range of frequencies and is transmitted in the range of directions corresponding to the second range of frequencies. A difference frequency signal, having a frequency that is a difference between the frequency of the first signal and the frequency of the second signal, is received from the radio-frequency identification tag. The difference frequency signal is processed to determine and display a direction of the radio-frequency identification tag from the locator device.
Electronically scannable device for radio-frequency identification
2022-01-04
Patent
Elektronische Ressource
Englisch
Radio frequency identification
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