Multistatic antenna configuration for radio frequency identification (RFID) systems
First Claim
1. A radio frequency identification (RFID) reader, comprising:
- a plurality of non-collocated antennae;
a radio frequency (RF) source for signal transmission;
a receiver to receive backscattered modulated signals from at least one RFID tag; and
a timing circuit coupled with the receiver, wherein the timing circuit is configured to determine a plurality of signal propagation timing delays via the at least one RFID tag between a first one of the plurality of antennae and each of the plurality of antennae except the first one based on the backscattered modulated signals; and
a processor coupled with the timing circuit to determine a plurality of signal path lengths between the first one of the plurality of antennae and each of the plurality of antennae except the first one based on the plurality of signal propagation timing delays, the processor to determine a location of the at least one RFID tag based on the plurality of signal path lengths.
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Accused Products
Abstract
Methods and apparatuses for configuring antennae of radio frequency identification reader systems. In one aspect of an embodiment, a radio frequency identification (RFID) reader system, includes: a receiver; a radio frequency (RF) source for signal transmission; and a switch matrix coupled with the receiver and the radio frequency sources to selectively couple the receiver and the radio frequency source to a plurality of non-collocated antennae. When in a first mode, the switch matrix connects the radio frequency source to a first one of the antennae for signal transmission and the receiver to a second one of the antennae for signal reception; and when in a second mode, the switch matrix connects the first one of the antennae for signal reception and, in one example, the second one or another one of the antennae to the RF source for signal transmission.
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Citations
7 Claims
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1. A radio frequency identification (RFID) reader, comprising:
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a plurality of non-collocated antennae; a radio frequency (RF) source for signal transmission; a receiver to receive backscattered modulated signals from at least one RFID tag; and a timing circuit coupled with the receiver, wherein the timing circuit is configured to determine a plurality of signal propagation timing delays via the at least one RFID tag between a first one of the plurality of antennae and each of the plurality of antennae except the first one based on the backscattered modulated signals; and a processor coupled with the timing circuit to determine a plurality of signal path lengths between the first one of the plurality of antennae and each of the plurality of antennae except the first one based on the plurality of signal propagation timing delays, the processor to determine a location of the at least one RFID tag based on the plurality of signal path lengths. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification