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High-Q and over-coupled near-field RFID reader antenna for improved tag read range

  • US 10,223,850 B2
  • Filed: 05/03/2017
  • Issued: 03/05/2019
  • Est. Priority Date: 10/31/2015
  • Status: Active Grant
First Claim
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1. An RFID system, comprising:

  • a tag including a tag antenna and a first integrated circuit coupled together that selectively transfers a data signal; and

    a reader including a reader antenna and a second integrated circuit coupled together that in combination receives the data signal from the tag;

    wherein at least one of the tag antenna and the reader antenna have a Q-factor that is greater than 30;

    wherein the reader antenna and the second integrated circuit are sufficiently matched in impedance to over-couple the reader antenna and the second integrated circuit to each other.

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