CPC H04B 7/145 (2013.01) [H01Q 3/44 (2013.01); H04B 7/084 (2013.01)] | 20 Claims |
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.
|