US 11,671,167 B2
System, panel device and method for passive reflection of RF signals
Erik Bengtsson, Eslöv (SE); Fredrik Rusek, Eslöv (SE); and Olof Zander, Södra Sandby (SE)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/608,971
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed May 5, 2020, PCT No. PCT/EP2020/062471
§ 371(c)(1), (2) Date Nov. 4, 2021,
PCT Pub. No. WO2020/254030, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 1950760-7 (SE), filed on Jun. 19, 2019.
Prior Publication US 2022/0216909 A1, Jul. 7, 2022
Int. Cl. H04B 7/145 (2006.01); H01Q 3/44 (2006.01); H04B 7/08 (2006.01)
CPC H04B 7/145 (2013.01) [H01Q 3/44 (2013.01); H04B 7/084 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for reflecting an RF signal, comprising:
a plurality of antenna units which are configured to receive and passively reflect the RF signal, wherein each of the antenna units comprises a respective phase shifter operable to adjustably impose a phase change on the RF signal before reflection,
a reference antenna, and
a control system in communication with the reference antenna and the respective phase shifter, said control system being configured to:
operate the respective phase shifter to phase align a first analog antenna signal received by the respective antenna unit in response to a first RF signal from a first device, with a first analog reference signal received by the reference antenna in response to the first RF signal,
determine, for the respective phase shifter, a first phase setting that corresponds to a phase of the respective phase shifter when the first analog antenna signal is phase aligned with the first analog reference signal, and
store the first phase setting.