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Mobile handheld antenna for reading tags

  • US 10,002,269 B2
  • Filed: 09/04/2014
  • Issued: 06/19/2018
  • Est. Priority Date: 09/04/2014
  • Status: Active Grant
First Claim
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1. A tag reader, comprising:

  • a. a mobile part including an antenna for positioning near a group of tags attached to items, transmitting a power signal to the tags and receiving a response from the tags;

    wherein the antenna has an internal impedance that increases or decreases responsive to objects located in its vicinity;

    b. a reader base for providing the power signal to the mobile part and for storing and analyzing information read from tags;

    wherein the information includes an identification code of each tag;

    c. a real-time antenna tuning circuit for adjusting the impedance of the antenna;

    wherein the real time antenna tuning circuit includes a sensor for determining power return loss of the antenna in real time;

    wherein the mobile part, reader base and real time antenna tuning circuit are wired together to transfer the power signal from the reader base to the antenna through the real-time antenna tuning circuit;

    wherein the real-time antenna tuning circuit monitors the power signal and adjusts the impedance of the antenna responsive to determining the power return loss; and

    wherein the mobile part includes a display that provides an indication if all the items attached to the group of tags were located; and

    wherein the real-time antenna tuning circuit is installed in the mobile part and connected by a cable to the reader base.

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