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US 12,706,370 B2Granted
RFID antenna for rejecting unwanted RF signals
AssigneeCheckpoint Systems, Inc.
InventorsThomas Weakley, Morui Li
Life of this patent
Estimating the term…
Abstract
A RFID label is shown and described herein. The RFID label includes a RFID antenna configured to provide attenuation of unwanted signals at relatively high frequencies, e.g., above 2 GHz and in the range of about 2 to about 5 GHz. The RFID label comprises a dipole antenna having tuning elements that attenuate or reject signals at high frequencies such as, for example, those frequencies at which microwave ovens operate.
Claims20
A dipole antenna for a radio frequency identification label comprising:
- a loop region;
- a first dipole element in electrical connection with the loop region and terminating at a first pad;
- a second dipole element in electrical connection with the loop region and terminating at a second pad;
- the first and second dipole elements extending in opposite directions from each other another along a horizontal axis of the dipole antenna;
- and
- at least one tuning element, wherein the at least one tuning element extends from one or both of said first and second dipole elements, a shape, a size, and a location of each of the at least one tuning elements being selected to attenuate a signal at a frequency band of greater than 2 GHz.
3 more elements
An radio frequency identification (RFID) label comprising:
- a dipole antenna formed on a substrate, the substrate having an adhesive for attaching the label to a surface;
- the dipole antenna having:
- a loop region;
- a first dipole element in electrical connection with the loop region and terminating at a first pad;
- a second dipole element in electrical connection with the loop region and terminating at a second pad;
- the first and second dipole elements extending in opposite directions from each other another along a horizontal axis of the dipole antenna;
- and
- at least one tuning element, wherein the at least one tuning element extends from one or both of said first and second dipole elements, a shape, a size, and a location of each of the at least one tuning elements being selected to attenuate a signal at a frequency band of greater than 2 GHz.
5 more elements
An article comprising:
- an article and a radio frequency identification (RFID) label attached to the article;
- the RFID label comprising:
- a dipole antenna formed on a substrate, the substrate having an adhesive for attaching the label to a surface;
- the dipole antenna having:
- a loop region;
- a first dipole element in electrical connection with the loop region and terminating at a first pad;
- a second dipole element in electrical connection with the loop region and terminating at a second pad;
- the first and second dipole elements extending in opposite directions from each other another along a horizontal axis of the dipole antenna;
- and
- at least one tuning element, wherein the at least one tuning element extends from one or both of said first and second dipole elements, a shape, a size, and a location of each of the at least one tuning elements being selected to attenuate a signal at a frequency band of greater than 2 GHz;
- wherein the desired level of attenuation is selected to prevent the RFID label from thermally damaging the article, when the RFID label is exposed to RF energy in excess of a predetermined power level within the predetermined frequency band.
8 more elements
Dependencies are inferred from the claim text.