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

Claim 14:
15. A method of operation of an energy harvester, adapted to receive energy from an energy transmitter using radiative coupling, the method comprising:
attempting to collect energy from a radio frequency signal on both a first frequency and a second frequency;
determining 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;
determining 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, transmitting 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, transmitting the radio frequency signal modulated with the signature of the energy harvester on the first frequency.