Wide bandwidth hybrid antenna for combination EAS and RFID label or tag
AssigneeTyco Fire & Security Services GmbH
InventorsRichard L. Copeland, Edward Day
Life of this patent
Estimating the term…
Abstract
A radio frequency identification (RFID) antenna exhibiting a multiple resonance is disclosed. In one exemplary embodiment, a dipole antenna and a loop antenna are disposed upon a substrate and have dimensions and orientation to exhibit the multiple resonance. The dipole antenna may exhibit a first dipole section having a first length and second dipole section having a second length. The loop antenna may be disposed in a region of the dipole antenna. The ratio of the perimeter of the loop antenna to the sum of the lengths of the dipole sections may be selected to exhibit the multiple resonance.
Claims13
A Radio Frequency Identification (RFID) antenna, comprising:
- a dipole antenna including a first dipole section having a first length and a second dipole section having a second length;
- a plurality of feed tabs;
- and
- a loop antenna having a perimeter, the loop antenna being electrically coupled to the first dipole section by at least one feed tab and electrically coupled to the second dipole section by a plurality of feed tabs, the length of the first and second dipole sections, the position of the loop antenna, and the number and positions of the plurality of feed tabs being selected to achieve a multiple resonance in a predetermined frequency band.
A combination Electronic Article Surveillance (EAS)/Radio Frequency Identification (RFID) security tag, comprising:
- an EAS component;
- an RFID component, comprising:
- a dipole antenna having a first section having a first length and a second section having a second length;
- a plurality of feed tabs;
- and
- a loop antenna in electrical communication with the dipole antenna by the plurality of feed tabs, the loop antenna having a perimeter, the first length and the second length of the dipole antenna, a position of the loop antenna and the numbers and positions of the plurality of feed tabs being selected to exhibit a multiple resonance in a predetermined frequency band.
Dependencies are inferred from the claim text.