Peel-off paper sticker circuit?

[p1ne]

Hi, I'm attaching image file of this peel-off paper sticker circuit (Image URL option from menu shows red X in post Preview, despite working link). What is this and what would it be used for? Thanks

 

[73's de Edd]

Sir p1ne . . .

A spiral inductor that has its central capacitor shunting it which is dimensioned to make a specific Radio Frequency tuned circuit, that keys a security alarm in a store unless you buy its attached merchandise and they scan and burn a link inside to disable the unit.
Wanna go check it out now ?

73's de Edd

 

[p1ne]

Thanks for replying, RFID tag. Probably the coolest part for me is how the passive chip gets charged by the transmitter radio wave, to ping back data.

 

[73's de Edd]

Your unit shown is just the much simpler passive security / anti theft tag for shoplifting deterrence.

The more sophisticated RFID tag has a micro sized I.c. included . In it's situation, the tuned loop will pick up RF energy from a scanner tool, that provides power to take the very specific data from that unit and transmit
back to the scan tool as a serial digital stream.

73's de Edd

 

[p1ne]

OK, thanks for responses.