The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2020
Filed:
Feb. 05, 2018
Impinj, Inc., Seattle, WA (US);
Theron Stanford, Seattle, WA (US);
Charles J. T. Peach, Seattle, WA (US);
Jay A. Kuhn, Seattle, WA (US);
Harley K. Heinrich, Snohomish, WA (US);
John D. Hyde, Corvallis, OR (US);
Christopher J. Diorio, Shoreline, WA (US);
Alberto Pesavento, Seattle, WA (US);
Impinj, Inc., Seattle, WA (US);
Abstract
Embodiments are directed to mitigating power-based impedance changes in Radio Frequency Identification (RFID) tags. The intrinsic impedance of components in an RFID tag front-end may change as incident RF power on the tag changes, causing the input impedance of the front-end to change and altering the RF properties of the RFID tag. A number of approaches can be used to mitigate input impedance variations due to power variations. One approach involves adjusting the operating point of one or more components in the RFID tag front-end to change their intrinsic impedances so as to counteract or mitigate the RF-power-based input impedance variation.