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Multistatic antenna configuration for radio frequency identification (RFID) systems

  • US 7,265,675 B1
  • Filed: 03/01/2005
  • Issued: 09/04/2007
  • Est. Priority Date: 03/01/2005
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) reader system, comprising:

  • a receiver;

    a radio frequency (RF) source for signal transmission;

    a switch matrix coupled with the receiver and the radio frequency source, the switch matrix to selectively couple the receiver and the radio frequency source to a plurality of non-collocated antennae;

    wherein 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

    wherein when in a second mode, the switch matrix connects the first one of the antennae for signal reception; and

    a timing circuit coupled with the radio frequency source, the timing circuit to determine a signal propagation delay between the first and second ones of the antennae via a radio frequency identification tag.

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