Mobile handheld antenna for reading tags
First Claim
Patent Images
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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Abstract
A tag reader, including:
- a. a mobile part having an antenna for positioning near a group of tags, 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; and
- c. a real-time antenna tuning circuit for adjusting the impedance of the antenna;
- 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, and wherein the real-time antenna tuning circuit monitors the power signal and adjusts the impedance of the antenna responsive to a determination in real-time of power return loss from the antenna.
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Citations
20 Claims
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1. A tag reader, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18)
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10. A method of reading tags by a tag reader having a reader base and a mobile part, comprising:
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positioning the mobile part including an antenna near a group of tags attached to items;
wherein the antenna has an internal impedance that increases or decreases responsive to objects located in its vicinity;receiving by a real-time antenna tuning circuit connecting between the reader base and the mobile part a power signal from the reader base;
wherein the real-time antenna tuning circuit is installed in the mobile part and connected by a cable to the reader base;providing the power signal to the antenna of the mobile part and receiving a response from the antenna; determining an antenna power return loss by a sensor in the real-time antenna tuning circuit from the provided signal and the response; adjusting the antenna impedance responsive to the determination in real-time of the power return loss from the antenna; reading information from the tags;
wherein the information includes an identification code of each tag;storing and analyzing the information to determine if all the tags of the group were located; and wherein the mobile part includes a display that provides an indication if all the items attached to the group of tags were located. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 19, 20)
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Specification