Rf reactivatable marker

Details Rf reactivatable marker Rf reactivatable marker

G - Physics

08

B

340/124.3

G08B 13/24 (2006.01) G01V 15/00 (2006.01) H01L 27/01 (2006.01)

Patent

CA 1261936

Abstract A marker for use in radio frequency electronic article surveillance systems where the marker contains an inductive-capacitive resonant circuit and is made reversibly deactivatable and reactivatable by the addition of a piece of magnetic material and means, such as a piece of permanently magnetizable material, for biasing the first material to prevent alternating fields induced therein from changing the magnetic state of that material, thereby preventing hysteresis losses from causing a lowering of the Q of the resonant circuit below the point of detection.

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