| 摘要 |
<p>Radio frequency identification (RFID) devices for use in RFID-based sensors and related methods are described herein. In one implementation, an RFID sensor system (1800) includes an RFID device (1801) having a near field only RFID tag (1802) and a conductive element (1804) which functions as a far field antenna. A coupling structure (2202, 2502, 2504) selectively locates the near field only RFID tag and the conductive element in at least a first position and a second position relative to each other; wherein in the first position, the RFID device only operates in a near field (1812), and in the second position, the RFID device operates in both the near field (1812) and a far field (1814). The system may also include an RFID reader (1808) and controller (1810) located within the far field (1814) to read the RFID device only when the coupling structure locates the components in the second position.</p> |
