System for multi-standard RFID tags
First Claim
1. A radio identification interrogator associated with a plurality of protocols including a first protocol and a second protocol different from the first protocol, comprising:
- a first radio frequency (RF) module being associated with a first frequency band and having a receiver and a frequency source, the frequency source of the first RF module having a frequency within the first frequency band, the receiver of the first RF module configured to receive a return signal associated with the first frequency band and associated with the first protocol;
a second radio frequency (RF) module being associated with a second frequency band and having a receiver and a frequency source, the frequency source of the second RF module having a frequency within the second frequency band and different from the frequency of the frequency source of the first RF module, the receiver of the second RF module configured to receive a return signal associated with the second frequency band of the second RF module and associated with the second protocol; and
a decoder coupled to the receiver of the first radio frequency module and the receiver of the second radio frequency module, the decoder having a field programmable gate array, and a first output channel and a second output channel, the first output channel being associated with the first protocol, the second output channel being associated with the second protocol, wherein the field programmable gate array is configured to receive a first pulse stream associated with the first output channel and a second pulse stream associated with the second output channel.
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Accused Products
Abstract
A reader for a radio frequency identification system capable of simultaneously reading tags operating a multiple frequencies. The reader includes a radio frequency module for each operating frequency of the tags. The radio frequency modules are coupled to a bus which is connected to an interrogator control module. Each of the radio frequency modules receives the return signal from the tags at the associated operating frequency and converts the return signal into a pulse sequence. The interrogator control module locks to and decodes the pulse sequence according to the protocol associated with the tag type.
49 Citations
18 Claims
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1. A radio identification interrogator associated with a plurality of protocols including a first protocol and a second protocol different from the first protocol, comprising:
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a first radio frequency (RF) module being associated with a first frequency band and having a receiver and a frequency source, the frequency source of the first RF module having a frequency within the first frequency band, the receiver of the first RF module configured to receive a return signal associated with the first frequency band and associated with the first protocol; a second radio frequency (RF) module being associated with a second frequency band and having a receiver and a frequency source, the frequency source of the second RF module having a frequency within the second frequency band and different from the frequency of the frequency source of the first RF module, the receiver of the second RF module configured to receive a return signal associated with the second frequency band of the second RF module and associated with the second protocol; and a decoder coupled to the receiver of the first radio frequency module and the receiver of the second radio frequency module, the decoder having a field programmable gate array, and a first output channel and a second output channel, the first output channel being associated with the first protocol, the second output channel being associated with the second protocol, wherein the field programmable gate array is configured to receive a first pulse stream associated with the first output channel and a second pulse stream associated with the second output channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
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a radio frequency module having a transmitter and a receiver, the transmitter being configured to send an output signal associated with a first tag operating parameter, the receiver being configured to receive a return signal associated with the output signal; a bus connected with the radio frequency module; and a decoder coupled to the bus and adapted to decode the return signal based on the first tag operating parameter comprising at least one parameter of a group including an encoding scheme, a data rate and a message length, the decoder further adapted to decode a second return signal based on a second tag operating parameter comprising at least one of a remaining parameter of the group including the encoding scheme, the data rate and the message length. - View Dependent Claims (10, 11, 12)
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13. A radio identification interrogator associated with a plurality of protocols including a first protocol and a second protocol different from the first protocol, comprising:
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a first radio frequency (RF) module being associated with a first frequency band and having a receiver, the receiver of the first RF module configured to receive a return signal associated with the first a frequency band and associated with the first protocol, the first frequency band is within one band from a group of a frequency band having an upper limit of 200 KHz, a frequency band substantially at 13.56 MHz, a frequency band substantially at 2.45 GHz, and a frequency band having a lower limit of 458 MHz and excluding the frequency band substantially at 2.45 GHz; a second radio frequency (RF) module being associated with second frequency band and having a receiver, the receiver of the second RF module configured to receive a return signal associated with the second frequency band and associated with the second protocol, the second frequency band is within a remaining one from the group of the frequency band having upper limit of 200 KHz, the frequency band substantially at 13.56 MHz, the frequency band substantially at 2.45 GHz, and the frequency band having the lower limit of 458 MHz and excluding the frequency band substantially at 2.45 GHz; and a decoder coupled to the receiver of the radio frequency module, the decoder having a first output channel and a second output channel, the first output channel being associated with the first protocol, and the second output channel being associated with the second protocol. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification