RFID System With an Eddy Current Trap
First Claim
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1. 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, andat 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 matching component configured to adjust the impedance of the multi-segment loop antenna assembly; and
an eddy current trap positioned a predetermined distance from the multi-segment loop antenna assembly.
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Abstract
An RFID antenna assembly configured to be energized with a carrier signal is disclosed. The RFID antenna assembly includes an inductive component including a loop antenna assembly, at least one capacitive component coupled to the inductive component, and an eddy current trap positioned a predetermined distance from the loop antenna assembly.
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Citations
18 Claims
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1. An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
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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 matching component configured to adjust the impedance of the multi-segment loop antenna assembly; and an eddy current trap positioned a predetermined distance from the multi-segment loop antenna assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
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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; at least one capacitive component coupled to the inductive component; and an eddy current trap positioned a predetermined distance from the loop antenna assembly. - View Dependent Claims (10, 11, 12, 13)
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14. An RFID antenna assembly configured to be energized with a carrier signal, the RFID antenna assembly comprising:
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an inductive component including a loop antenna assembly, wherein the inductive component is configured to detect the presence of a first RFID tag assembly and not detect the presence of a second RFID tag assembly; at least one capacitive component coupled to the inductive component; and an eddy current trap positioned a predetermined distance from the loop antenna assembly. - View Dependent Claims (15, 16, 17, 18)
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Specification