RFID System With an Eddy Current Trap

摘要

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.

主权项

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,wherein the length of each antenna segment is no more than 25% of the wavelength of the carrier signal; 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.