Rfid system
AssigneeDEKA Products Limited Partnership
InventorDavid Blumberg, JR.
Life of this patent
Estimating the term…
Abstract
A magnetic field focusing assembly includes a magnetic field generating device configured to generate a magnetic field, and a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus the magnetic field produced by the magnetic field generating device.
Claims37
An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
- an inductive component including a loop antenna assembly, wherein the circumference of the loop antenna assembly is no more than 25% of the wavelength of the carrier signal;
- and
- at least one capacitive component coupled to the inductive component.
An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
- an inductive component including a multi-segment loop antenna assembly, wherein the multi-segment loop antenna assembly includes:
- at least a first antenna segment including at least a first phase shift element configured to reduce the phase shift of the carrier signal within the at least a first antenna segment, and
- at least a second antenna segment including at least a second phase shift element configured to reduce the phase shift of the carrier signal within the at least a second antenna segment,
- wherein the length of each antenna segment is no more than 25% of the wavelength of the carrier signal;
- and
- at least one matching component configured to adjust the impedance of the multi-segment loop antenna assembly;
A magnetic field focusing assembly comprising:
- a magnetic field generating device configured to generate a magnetic field;
- and
- a split ring resonator assembly configured to be magnetically coupled to the magnetic field generating device and configured to focus at least a portion of the magnetic field produced by the magnetic field generating device.
An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
- an inductive component including a multi-segment loop antenna assembly, wherein the multi-segment loop antenna assembly includes:
- at least a first antenna segment including at least a first phase shift element configured to reduce the phase shift of the carrier signal within the at least a first antenna segment, and
- at least a second antenna segment including at least a second phase shift element configured to reduce the phase shift of the carrier signal within the at least a second antenna segment,
- at least one far field antenna assembly;
- wherein the length of each antenna segment is no more than 25% of the wavelength of the carrier signal;
- and
- at least one matching component configured to adjust the impedance of the multi-segment loop antenna assembly.
Dependencies are inferred from the claim text.