Impinj‘s patented method for RFID readers involves supplying power to tags during frequency hops by transmitting RF waveforms at different frequencies without powering down the RFID tag. This innovative approach ensures seamless operation and communication between the reader and tag during frequency changes. GlobalData’s report on Impinj gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Impinj, Contactless verification was a key innovation area identified from patents. Impinj's grant share as of April 2024 was 78%. Grant share is based on the ratio of number of grants to total number of patents.

Rfid reader method for continuous power supply during frequency hops

Source: United States Patent and Trademark Office (USPTO). Credit: Impinj Inc

A recently granted patent (Publication Number: US11960955B1) discloses a method for a Radio-Frequency Identification (RFID) reader that transmits commands to an RFID tag using amplitude modulation (AM) of a radio frequency (RF) waveform. The method involves transmitting the RF waveform at a first frequency with a command modulated onto it, modulating the RF waveform with a low-amplitude AM pulse, switching the frequency of the RF waveform to a second frequency during the low-amplitude pulse, and transmitting the RF waveform at the second frequency. This innovative approach ensures that the RFID tag does not power down when the frequency of the RF waveform is changed, maintaining an average power level sufficient for the tag to receive the command.

Furthermore, the patent includes detailed claims related to the modulation techniques, frequency switching processes, and the components involved in the RFID reader. The method described in the patent allows for efficient communication between the RFID reader and tag by utilizing specific modulation schemes and frequency switching mechanisms. By implementing these techniques, the RFID reader can transmit commands effectively without causing the RFID tag to power down during frequency changes. The patent also highlights the compatibility of the method with the Gen2 Specification, ensuring standardization and interoperability within RFID systems. Overall, this patent introduces a novel method for RFID communication that addresses power management issues during frequency transitions, enhancing the reliability and performance of RFID systems.

To know more about GlobalData’s detailed insights on Impinj, buy the report here.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.