Security Device Using a Thick Dipole Antenna
AssigneeAvery Dennison Corporation
InventorIan James FORSTER
Life of this patent
Estimating the term…
Abstract
The present invention discloses a security device constructed from a material having a skin depth that is greater than about 10 times the normal skin depth for radio frequency identification device functioning in one of UHF, HF and LF frequencies. The security device of the present invention provides a more durable and robust security device that can be used in facilitating brand identification and awareness. In one embodiment the antenna material of the present invention may illustrate a wide variety of visual information.
Claims20
A security device having a radio frequency identification device (RFID) comprising:
- a material for use in forming an antenna having a perimeter and at least one opening formed in the material, the opening having an open end in the perimeter and extending inwardly from the perimeter and a closed end that terminates in an area of the material away from the perimeter wherein the opening has a first side and a second side;
- an integrated circuit disposed between the first and second side of the opening;
- and
- wherein the material has a thickness greater than 10 times skin depth required for radio frequency purposes in one of UHF, HF or LF and the at least one opening forms an antenna for use with an RFID device.
A method of constructing a RFID security device comprising the steps of:
- providing a conductive material having a perimeter and an integrated circuit, the conductive material having a thickness greater than 10 times skin depth required for radio frequency purposes in one of UHF, HF or LF;
- cutting at least one opening in the conductive material, the opening has an open end in the perimeter and a closed end extending in an area of the conductive material inwardly from the perimeter and the opening has a first and second side;
- and
- attaching an integrated circuit between the first and second side of the opening to form an RFID device.
A security device having a radio frequency identification device attached to an article wherein the security device comprises:
- a blank of conductive material for use in forming an antenna having a perimeter and at least one opening formed in the conductive material, the opening having an open end in the perimeter and extending inwardly from the perimeter and a closed end that terminates in an area of the material away from the perimeter wherein the opening has a first side and a second side;
- and
- an integrated circuit disposed between the first and second side of the opening;
- and
- wherein the material has a thickness greater than 10 times skin depth required for radio frequency purposes in one of UHF, HF or LF and the at least one opening forms an antenna for use with an RFID device.
A security device having a radio frequency identification device (RFID) comprising:
- a metal in combination with at least one other material for use in forming an antenna having a perimeter and at least one opening formed in the metal, the opening having an open end in the perimeter and extending inwardly from the perimeter and a closed end that terminates in an area of the metal away from the perimeter wherein the opening has a first side and a second side;
- an integrated circuit disposed between the first and second side of the opening;
- and
- wherein the metal has a thickness greater than 10 times skin depth required for radio frequency purposes in one of UHF, HF or LF and the at least one opening forms an antenna for use with an RFID device.
A security device having a radio frequency identification device (RFID) comprising:
- a first and second material for use in forming an antenna having a perimeter and at least one opening formed in the material, the opening having an open end in the perimeter and extending inwardly from the perimeter and a closed end that terminates in an area of the first and second material away from the perimeter wherein the opening has a first side and a second side;
- an integrated circuit disposed between the first and second side of the opening;
- and
- wherein the material has a thickness greater than 10 times skin depth required for radio frequency purposes in one of UHF, HF or LF and the at least one opening forms an antenna for use with an RFID device.
Dependencies are inferred from the claim text.