ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,423,546, issued on Sept. 23, was assigned to Impinj Inc. (Seattle).
"Controlling RFID tag population backscatter characteristics" was invented by Joshua F. Ensworth (Bothell, Wash.), Alberto Pesavento (Seattle), Harley K. Heinrich (Snohomish, Wash.), Theron Stanford (Seattle) and Thomas G. Anderl (Seattle).
According to the abstract* released by the U.S. Patent & Trademark Office: "RFID tag ICs in a population can adjust the impedance values used to backscatter-modulate reply signals to increase the distribution or spread of backscattered signal parameters, thereby facilitating the recovery of collided tag replies. An RFID tag IC may adjust its impedance value(s) based on a reader c...