公开(公告)号：WO2022261478A1

公开(公告)日：2022-12-15

申请号：PCT/US2022/033077

申请日：2022-06-10

Applicant: IMPINJ, INC.

Inventor： OURSLAND, Austin ,  MARTINEZ, Rene Dominic ,  MORETTI, Vincent C. ,  NIKITIN, Pavel ,  ONEN, Omer ,  TARANTINO, Joe ,  THOMAS, Michael H. ,  TEXERMAN, Yossi ,  COOPER, Scott A. ,  DIORIO, Christopher J.

IPC: G01S13/38 ,  G01S5/14 ,  G01S13/58

Abstract: RFID tag reply phase measurements can be used to estimate tag location and motion. The phase measurements can be used to directly calculate tag location / motion or to generate correlation probabilities with candidate tags having different location / motion characteristics. An RFID reader system can take multiple phase measurements for a tag, at different carrier frequencies, within a single inventory round, to ensure that the tag remains within range of the reader system.