US 11,989,614 B2
Daisy chain antenna
Graham Murdoch, St Peters (AU); Tai Wai Pong, St Peters (AU); Ganesh Nagendra, St Peters (AU); and Yuxin Sun, St Peters (AU)
Assigned to SATO HOLDINGS KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/608,614
Filed by SATO HOLDINGS KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Jun. 18, 2020, PCT No. PCT/IB2020/055674
§ 371(c)(1), (2) Date Nov. 3, 2021,
PCT Pub. No. WO2020/254993, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019902158 (AU), filed on Jun. 20, 2019.
Prior Publication US 2022/0230004 A1, Jul. 21, 2022
Int. Cl. G06K 7/10 (2006.01)
CPC G06K 7/10356 (2013.01) 14 Claims
OG exemplary drawing
 
1. An RFID system comprising:
an RFID reader configured to interrogate RFID antennas;
a series of cable links;
an antenna array comprising two or more RFID antennas serially connectable to the RFID reader via said series of cable links, each RFID antenna associated with a respective cable link, said respective cable link being the last one of the series of cable links in the connection from the RFID reader to the respective RFID antenna, each cable link having a respective cable length;
a respective length compensation unit associated with each RFID antenna, and connected between the RFID antenna and the respective associated cable link, the length compensation unit configured to adjust a total cable length between the RFID reader and a respective RFID antenna to be an effective cable length, the total cable length comprising a sum of cable lengths for each cable link of the series of cable links connecting the RFID reader and the respective RFID antenna.