Patent ID: 11929792
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. An energy harvester adapted to receive energy from an energy transmitter using radiative coupling, wherein the energy harvester is adapted to:
attempt to collect energy from a radio frequency signal on both a first frequency and a second frequency;
determine that a threshold amount of energy has been collected and that a signature of the radio frequency signal matches a signature of the energy harvester;
determine whether the signature of the radio frequency signal that matches the signature of the energy harvester was detected on the first frequency or the second frequency;
upon determining that the signature of the radio frequency signal that matches the signature of the energy harvester was detected on the first frequency, transmit a radio frequency signal modulated with the signature of the energy harvester on the second frequency; and
upon determining that the signature of the radio frequency signal that matches the signature of the energy harvester was detected on the second frequency, transmit the radio frequency signal modulated with the signature of the energy harvester on the first frequency.