| 摘要 |
A radio frequency identification (RFID) system with a parasitic element to improve coverage and increase reading distance of RFID tags is disclosed. The parasitic element may be a loop of a conductive material and is not physically connected to any circuit. One or more RFID tags may be located within a predetermined distance of the parasitic element. The parasitic element receives a first signal from an RFID reader and re-radiates the first signal. The re-radiation improves the coverage of the RFID system. An RFID tag receives the re-radiated first signal from the parasitic element and, in response, transmits a second signal. The parasitic element receives the second signal from the RFID tag and re-radiates the second signal. The RFID reader receives the re-radiated second signal from the parasitic element and reads the information sent in the second signal by the RFID tag.
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