Patent ID: 8026818

Claim:
A security tag comprising: an electronic article surveillance (EAS) element, said EAS element comprising a resonant circuit formed of a coil and a capacitor, said coil comprising a first extension, constituting a first capacitor plate, on a first side of said coil and a second extension on a second side, opposite to said first side, of said coil, said second extension comprising a pair of elements constituting a dipole antenna, said capacitor comprising a conductive layer, constituting a second capacitor plate, having one end electrically coupled to one end of said coil and wherein said conductive layer is disposed on top of said first extension with a dielectric layer disposed in between said conductive layer and said first extension; and an ultrahigh frequency (UHF) element, said UHF element comprising a loop antenna coupled to a radio frequency (RFID) integrated circuit, said loop antenna having a portion that coincides with said coil on said first side.