Tagging system having resonant frequency shift compensation

摘要: A tagging system (20) compensates for both resonant frequency spatial dependent shifts and detecting data circuits (DC1-DC6) on an RF tag 10 which is carried by a tagged object (34). The includes at least one transmitter (26) receiver (28) determining the actual frequencies of reference (SC1-SC5, FC1-FC4) 10. microprocessor controller (22), in response to difference between undisturbed circuits, provides compensating factors compensate effects (10). determine each circuit (22) then determines (10) from compensation factors.