Symbol Technologies, LLC

Motorola Solutions, Inc.

Theodore Hockey

Joseph R White

Wayne E Shanks

Michael C Sloan

Hai Tran

Randall Allen Drago

Ming-Hao Sun

Omid Roshan-Afshar

Timothy J Collins

Kevin James Powell

Benjamin Bekritsky

Chun-Huei Bair

Andreas Schaller

Jonathan Pfeifer

An apparatus system, and techniques for detecting temperature change are disclosed. The system includes a temperature sensitive antenna that can be included in an RFID tag device. The antenna is associated with a temperature sensitive material that, upon being exposed to a particular temperature level over a time interval, causes at least one of a change in the resonance frequency of the antenna and change in antenna signal strength (e.g., antenna gain). An RFID reader is also provided that sends commands to the tag device and determines the existence of a temperature change based on a comparison of signal strengths received on different frequencies from the antenna.

RFID tag device with temperature sensitive antenna

Methods, systems, and apparatuses for antenna designs for radio frequency identification (RFID) tags are described.

Antenna designs for radio frequency identification (RFID) tags

A method for pipelined processing of access commands to a population of radio frequency identification (RFID) tags is provided. The method includes transmitting a first queued access command to a first tag in the population of RFID tags, transmitting a second queued access command to a second tag in the population of RFID tags, and transmitting a status request command to the first tag. The queued access command causes the first tag to perform an operation and upon completion of the operation, to suspend transaction processing. The second queued access command is transmitted while the first tag is performing the command operation. The status request command causes the first tag to resume normal processing.

Queued operations in HF/UHF RFID applications

Methods, systems, and apparatuses for detecting a reader signal strength in a radio frequency identification (RFID) tag is described. A tag is configured to monitor an attribute of a reader transmitted signal, such as the signal strength. The tag generates an indication of the signal attribute, and transmits the indication of the signal attribute to the reader.

RFID tag receive signal strength indicator

Methods, systems, and apparatuses for monitoring and refreshing data stored in radio frequency identification (RFID) tags are described. A voltage margin for data stored in memory of a tag is checked. If the voltage margin has decreased to an undesirable level, the data stored in the tag is refreshed.

RFID tag data retention verification and refresh

Methods, systems, and apparatuses for a radio frequency identification (RFID) tag tester/programmer and marker are described. A surface is in contact with a web of RFID tags. The surface has a first portion and a second portion. The first portion of the surface is grounded to ground tags of the web that are in contact with the first portion. A radio frequency (RF) source transmits a RF signal to interact with a tag adjacent to the second portion of the surface. The RF signal may be a signal for testing the tag and/or a signal for programming the tag.

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Mount Airy, MD, United States of America

Theodore Hockey