Impinj has been granted a patent for an RFID IC that can operate at a low clock frequency while tuning impedance matching to increase power extraction from RF waves. The IC adjusts its clock frequency during the tuning process to ensure protocol compliance. GlobalData’s report on Impinj gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Impinj, Contactless verification was a key innovation area identified from patents. Impinj's grant share as of January 2024 was 79%. Grant share is based on the ratio of number of grants to total number of patents.
Rfid ic tuning to increase power extraction efficiency
A recently granted patent (Publication Number: US11853826B1) discloses a Radio Frequency Identification (RFID) integrated circuit (IC) that operates based on a minimum clock frequency required by a specific protocol. The RFID IC includes a variable impedance, an antenna port connected to the variable impedance, and a tuning circuit to adjust the impedance. The IC is designed to extract power from an RF wave received by the antenna, initially operating at a lower clock frequency and power level. Upon tuning the impedance to enhance power extraction, the IC can then operate at a higher clock frequency and power level, meeting the protocol requirements. The tuning process is triggered by factors such as received commands, power insufficiency, operating state, or power-up status.
Furthermore, the patent also covers a method for operating the RFID IC, involving the extraction of power from the RF wave, tuning of the impedance to increase power extraction, and transitioning to a higher clock frequency and power level to comply with the protocol. The method includes determining the need for impedance tuning based on various factors like received commands, power insufficiency, operating state, or power-up status. Additionally, the method involves adjusting the clock oscillator parameters to switch between different clock frequencies required for operation. This innovative approach ensures efficient operation of RFID tags by dynamically adjusting power levels and clock frequencies based on protocol requirements and operating conditions.
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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.
