RADIO FREQUENCY IDENTIFICATION (RFID) READER WITH FREQUENCY ADJUSTMENT OF CONTINUOUS RADIO FREQUENCY (RF) WAVE
First Claim
1. A method of communicating by a Radio Frequency Identification (RFID) reader, the method comprising:
- transmitting, by the RFID reader, a continuous radio frequency (RF) wave at a first frequency;
adjusting, by the RFID reader, the first frequency of the continuous RF wave to a second frequency; and
thenreceiving a backscattered RF wave at the first frequency from an RFID tag, the backscattered RF wave generated by the RFID tag in response to the continuous RF wave of the first frequency, wherein a difference between the first frequency and the second frequency is equal to or greater than a frequency difference threshold to reduce interference between the backscattered RF wave and the continuous RF wave.
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Abstract
A method of communicating by a Radio Frequency Identification (RFID) reader includes transmitting, by the RFID reader, a continuous radio frequency (RF) wave at a first frequency. The method also includes adjusting, by the RFID reader, the first frequency of the continuous RF wave to a second frequency and then receiving a backscattered RF wave at the first frequency from an RFID tag. The backscattered RF wave is generated by the RFID tag in response to the continuous RF wave of the first frequency. A difference between the first frequency and the second frequency is equal to or greater than a frequency difference threshold to reduce interference between the backscattered RF wave and the continuous RF wave.
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Citations
30 Claims
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1. A method of communicating by a Radio Frequency Identification (RFID) reader, the method comprising:
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transmitting, by the RFID reader, a continuous radio frequency (RF) wave at a first frequency; adjusting, by the RFID reader, the first frequency of the continuous RF wave to a second frequency; and
thenreceiving a backscattered RF wave at the first frequency from an RFID tag, the backscattered RF wave generated by the RFID tag in response to the continuous RF wave of the first frequency, wherein a difference between the first frequency and the second frequency is equal to or greater than a frequency difference threshold to reduce interference between the backscattered RF wave and the continuous RF wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A Radio Frequency Identification (RFID) reader, comprising:
a transceiver configured to; transmit a continuous radio frequency (RF) wave at a first frequency; adjust the first frequency of the continuous RF wave to a second frequency; and
thenreceive a backscattered RF wave at the first frequency from an RFID tag, the backscattered RF wave generated by the RFID tag in response to the continuous RF wave of the first frequency, wherein a difference between the first frequency and the second frequency is equal to or greater than a frequency difference threshold to reduce interference between the backscattered RF wave and the continuous RF wave. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A Radio Frequency Identification (RFID) reader, comprising:
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means for transmitting a continuous radio frequency (RF) wave at a first frequency; means for adjusting the first frequency of the continuous RF wave to a second frequency; and means for receiving a backscattered RF wave at the first frequency from an RFID tag, the backscattered RF wave generated by the RFID tag in response to the continuous RF wave of the first frequency, wherein a difference between the first frequency and the second frequency is equal to or greater than a frequency difference threshold to reduce interference between the backscattered RF wave and the continuous RF wave. - View Dependent Claims (23, 24)
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25. A non-transitory computer-readable storage medium including computer-executable instructions recorded thereon, wherein executing the computer-executable instructions on one or more processors of a Radio Frequency Identification (RFID) reader causes the RFID reader to perform operations, comprising:
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transmit a continuous radio frequency (RF) wave at a first frequency; adjust the first frequency of the continuous RF wave to a second frequency; and then receive a backscattered RF wave at the first frequency from an RFID tag, the backscattered RF wave generated by the RFID tag in response to the continuous RF wave of the first frequency, wherein a difference between the first frequency and the second frequency is equal to or greater than a frequency difference threshold to reduce interference between the backscattered RF wave and the continuous RF wave. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification