Excess radio-frequency (RF) power storage and power sharing RF identification (RFID) tags, and related connection systems and methods
First Claim
1. A RFID tag connection system, comprising:
- a first RFID tag comprising at least one first antenna configured to receive first RF power in received first wireless RF signals, a first energy storage device configured to store excess energy derived from excess received first RF power, and one or more first energy sharing conductors coupled to the first energy storage device; and
a second RFID tag comprising at least one second antenna configured to receive second RF power in received second wireless RF signals, and one or more second energy sharing conductors;
the first energy storage device forming a shared energy storage device when the one or more first energy sharing conductors of the first RFID tag are connected to the one or more second energy sharing conductors of the second RFID tag;
the first RFID tag further comprises a first power manager configured to store excess energy derived from the excess received first RF power in the shared energy storage device if the received first RF power exceeds a first operational threshold power for the first RFID tag; and
the second RFID tag further comprises a second power manager configured to store excess energy derived from excess received second RF power in the shared energy storage device if the received second RF power exceeds a second operational threshold power for the second RFID tag.
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Accused Products
Abstract
Excess radio-frequency (RF) power storage and power sharing RF Identification (RFID) tags, and related RFID tag connection systems and methods are disclosed. The excess RF power storage and power sharing RFID tags and related RFID tag connection systems and methods in embodiments disclosed herein allow connected RFID tags to store excess energy derived from excess received RF power in a shared energy storage device. In this manner, an individual RFID tag or a group of connected RFID tags in the RFID tag connection system can continue operation during temporary times when sufficient RF power is not being received from a RFID reader. Sharing stored energy derived from excess received RF power in a shared energy storage device among connected RFID tags in a RFID tag connection system can significantly mitigate problems of RF power interruption.
425 Citations
26 Claims
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1. A RFID tag connection system, comprising:
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a first RFID tag comprising at least one first antenna configured to receive first RF power in received first wireless RF signals, a first energy storage device configured to store excess energy derived from excess received first RF power, and one or more first energy sharing conductors coupled to the first energy storage device; and a second RFID tag comprising at least one second antenna configured to receive second RF power in received second wireless RF signals, and one or more second energy sharing conductors; the first energy storage device forming a shared energy storage device when the one or more first energy sharing conductors of the first RFID tag are connected to the one or more second energy sharing conductors of the second RFID tag; the first RFID tag further comprises a first power manager configured to store excess energy derived from the excess received first RF power in the shared energy storage device if the received first RF power exceeds a first operational threshold power for the first RFID tag; and the second RFID tag further comprises a second power manager configured to store excess energy derived from excess received second RF power in the shared energy storage device if the received second RF power exceeds a second operational threshold power for the second RFID tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of sharing stored excess RF power storage between RFID tags, comprising:
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receiving first RF power in first wireless RF signals received by at least one first antenna of a first RFID tag comprising one or more first energy sharing conductors coupled to a first energy storage device; receiving second RF power in second wireless RF signals received by at least one second antenna of a second RFID tag comprising one or more second energy sharing conductors; connecting the one or more first energy sharing conductors of the first RFID tag to the one or more second energy sharing conductors of the second RFID tag to form at least a portion of a shared energy storage device from the first energy storage device; storing excess energy derived from excess received first RF power in the shared energy storage device if the received first RF power exceeds a first operational threshold power for the first RFID tag; and storing excess energy derived from excess received second RF power in the shared energy storage device if the received second RF power exceeds a second operational threshold power for the second RFID tag. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification