Radio frequency identification devices and methods
First Claim
1. An RFID device, comprising:
- a device having a wall structure defining a chamber; and
an RFID tag positioned inside of the chamber at a location spaced away from the wall structure by a gap such that the RFID tag can operatively receive and transmit signals.
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Abstract
The present invention provides compatibility of radio frequency identification (RFID) with devices that interfere with radio signals. An RFID tag is positioned at a particular location inside of a chamber of a device or object to be identified, such as a metallic chamber of a pallet, and spaced away from metallic structures by a gap. The RFID tag is tuned to the chamber by positioning the tag at a location in which radio waves entering the chamber are reflected and received by the RFID tag rather than being absorbed or affected by interference. Because of the tuning, the device or object to be identified is utilized as an antenna for the RFID tag. The RFID tag can be integrated into the structure carrying the tag rather than merely attached to the structure, for example on an outside surface.
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Citations
36 Claims
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1. An RFID device, comprising:
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a device having a wall structure defining a chamber; and
an RFID tag positioned inside of the chamber at a location spaced away from the wall structure by a gap such that the RFID tag can operatively receive and transmit signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An RFID device, comprising:
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a device having metallic material and a wall structure defining a chamber;
a radio wave passage through the wall structure to inside of the chamber; and
an RFID tag positioned inside of the chamber at a location spaced away from the wall structure such that the RFID tag can operatively receive signals passing into the chamber through the radio wave passage and operatively transmit signals out of the chamber through the radio wave passage. - View Dependent Claims (14, 15, 16, 17)
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18. A pallet, comprising:
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top and bottom members;
support members connected to the top and bottom members;
a wall structure defining a chamber and a radio wave passage through the wall structure to the chamber; and
an RFID tag positioned inside of the chamber at a location spaced away from the wall structure such that the RFID tag can operatively receive signals passing into the chamber through the radio wave passage and operatively transmit signals out of the chamber through the radio wave passage. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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- 33. A method of enabling a device to be identified by RFID, comprising positioning an RFID tag within a chamber of the device at a tuned location such that radio waves passing into the chamber reflect off of internal walls of the chamber and are operatively received by the RFID tag.
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36. A method of RFID identification, comprising:
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passing a first radio signal into a chamber having an RFID tag;
reflecting the first radio signal off of internal walls of the chamber;
receiving the reflected first radio signal by the RFID tag;
transmitting a second radio signal by the RFID tag; and
passing the second radio signal out of the chamber.
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Specification