An apparatus for transferring energy wirelessly to at least one receive antenna of at least one receiver, the apparatus comprising: a first transmit antenna configured to generate a first wireless field when the at least one receiver is in an energy transfer region of the first transmit antenna; a second transmit antenna spatially separated from the first transmit antenna, the second transmit antenna configured to generate a second wireless field when the at least one receiver is in an energy transfer region of the second transmit antenna; and a controller operationally coupled to the first transmit antenna and the second transmit antenna and configured to activate at least one of the first transmit antenna or the second transmit antenna based on whether the at least one receiver is in an energy transfer region of one or both of the first wireless field and the second wireless field, the controller further configured to control, when both the first transmit antenna and the second transmit antenna are activated a mode of operation of the apparatus, and wherein the controller is further configured to measure at least one of a first coupling level between the first transmit antenna and the at least one receive antenna, a second coupling level between the first transmit antenna and the second transmit antenna, or a leakage level of the energy transfer between the first transmit antenna and the at least one receive antenna and selecting the mode of operation based on the measurement wherein said mode of operation is selected from the first transmit antenna and the second transmit antenna independently and concurrently transfer energy wirelessly to a same receiver via the first and second wireless fields, the first transmit antenna and the second transmit antenna jointly transfer energy wirelessly to the same receiver via the first and second wireless fields, or the first transmit antenna and the second transmit antenna transfer energy wirelessly to different receivers via the first and second wireless fields. a first transmit antenna configured to generate a first wireless field when the at least one receiver is in an energy transfer region of the first transmit antenna; a second transmit antenna spatially separated from the first transmit antenna, the second transmit antenna configured to generate a second wireless field when the at least one receiver is in an energy transfer region of the second transmit antenna; and a controller operationally coupled to the first transmit antenna and the second transmit antenna and configured to activate at least one of the first transmit antenna or the second transmit antenna based on whether the at least one receiver is in an energy transfer region of one or both of the first wireless field and the second wireless field, the controller further configured to control, when both the first transmit antenna and the second transmit antenna are activated a mode of operation of the apparatus, and wherein the controller is further configured to measure at least one of a first coupling level between the first transmit antenna and the at least one receive antenna, a second coupling level between the first transmit antenna and the second transmit antenna, or a leakage level of the energy transfer between the first transmit antenna and the at least one receive antenna and selecting the mode of operation based on the measurement wherein said mode of operation is selected from the first transmit antenna and the second transmit antenna independently and concurrently transfer energy wirelessly to a same receiver via the first and second wireless fields, the first transmit antenna and the second transmit antenna jointly transfer energy wirelessly to the same receiver via the first and second wireless fields, or the first transmit antenna and the second transmit antenna transfer energy wirelessly to different receivers via the first and second wireless fields.