Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

Abstract: A resonator connector for a wireless power transfer system includes: one or more conducting materials to carry electricity between two or more electromagnetic resonators; a first plug coupled with the one or more conducting materials; a second plug coupled with the one or more conducting materials; and an impedance module coupled with the one or more conducting materials, the impedance module including an impedance matching network; wherein the impedance module is configurable to adjust electrical properties of the one or more conducting materials, using the impedance matching network, when the resonator connector electrically couples together the two or more electromagnetic resonators of the wireless power transfer system including at least three electromagnetic resonators, so as to improve power transfer efficiency among the at least three electromagnetic resonators of the wireless power transfer system, the at least three electromagnetic resonators including the two or more electromagnetic resonators.

Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

Abstract: A device for testing a wireless power network, where the network includes at least one power source, at least one load, and resonators configured to couple wireless power from the at least one power source to the at least one load. The device includes: a user interface for receiving input from a user and providing information to the user; a measurement module for measuring (directly or indirectly) at least one operational characteristic of the wireless power network and information about the geometric arrangement of the multiple resonators in the wireless power network; a memory for storing design specifications about the wireless power network; and an electronic processor configured to calculate information about a performance of the wireless power network based on the operational characteristic, the information about the geometric arrangement of the resonators, and the stored design specifications, and further configured to provide the performance information through the user interface.

Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

Abstract: A device for testing a wireless power network is disclosed. The network includes at least one power source, at least one load, and multiple resonators configured to couple wireless power from the at least one power source to the at least one load.

Abstract: The disclosure features power transmitting apparatus for wireless power transfer to a receiver that includes a housing having a form factor that corresponds to a container featuring lateral surfaces, a bottom surface, and an opening opposite the bottom surface, a first coil formed by a continuous path of electrically conductive material and featuring a plurality of non-planar loops that conform to a first pair of opposite lateral surfaces and to the bottom surface, and a second coil formed by a continuous path of electrically conductive material and featuring a plurality of non-planar loops that conform to a second pair of opposite lateral surfaces and to the bottom surface.

Abstract: A wireless power network including multiple electromagnetic resonators each capable of storing electromagnetic energy at a resonant frequency is disclosed. The multiple resonators include: a first resonator configured to be coupled to a power source to receive power from the power source; a second resonator configured to be coupled to a load to provide power to the load, and one or more intermediate resonators. The first resonator is configured to provide power from the power source to the second resonator through the one or more intermediate resonators. At least a first pair of resonators among the multiple resonators is configured to exchange power wirelessly, and at least a second pair of the resonators among the multiple resonators is configured to exchange power through a wired electrically conductive connection.

Abstract: The disclosure features wireless energy transfer sources that include at least two source resonators and a power source, where: each of the at least two source resonators has a nominal impedance when a device resonator is not positioned on or near any of the at least two source resonators, the nominal impedances of each of the at least two source resonators varying by 10% or less from one another; and the at least two source resonators are configured so that during operation of the wireless energy transfer source, when a device resonator is positioned on or near a first one of the at least two source resonators: (a) the impedance of the first source resonator is reduced to a value smaller than the nominal impedances of each of the other resonators by a factor of 2 or more.

Abstract: The disclosure features power transmitting apparatus for wireless power transfer to a receiver that includes a housing having a form factor that corresponds to a container featuring lateral surfaces, a bottom surface, and an opening opposite the bottom surface, a first coil formed by a continuous path of electrically conductive material and featuring a plurality of non-planar loops that conform to a first pair of opposite lateral surfaces and to the bottom surface, and a second coil formed by a continuous path of electrically conductive material and featuring a plurality of non-planar loops that conform to a second pair of opposite lateral surfaces and to the bottom surface.

Abstract: A device for testing a wireless power network is disclosed. The network includes at least one power source, at least one load, and multiple resonators configured to couple wireless power from the at least one power source to the at least one load.

Abstract: A wireless power network including multiple electromagnetic resonators each capable of storing electromagnetic energy at a resonant frequency is disclosed. The multiple resonators include: a first resonator configured to be coupled to a power source to receive power from the power source; a second resonator configured to be coupled to a load to provide power to the load, and one or more intermediate resonators. The first resonator is configured to provide power from the power source to the second resonator through the one or more intermediate resonators. At least a first pair of resonators among the multiple resonators is configured to exchange power wirelessly, and at least a second pair of the resonators among the multiple resonators is configured to exchange power through a wired electrically conductive connection.

Abstract: Methods and systems for wireless transmission of power to a battery-operated device include a power receiving apparatus featuring at least one receiving resonator and a housing dimensioned to engage with a battery compartment of a battery-operated device, and a power transmitting apparatus including: a first pair of spaced source resonators, where each source resonator in the first pair features a loop of conducting material surrounding a common first axis; a second pair of spaced source resonators, where each source resonator in the second pair features a loop of conducting material surrounding a common second axis different from the first axis; and a controller coupled to the first and second pairs of source resonators and configured to provide non-radiative wireless power transfer from the power transmitting apparatus to the power receiving apparatus by alternately activating the first and second pairs of source resonators.

Abstract: Methods and systems for wireless transmission of power to a battery-operated device include a power receiving apparatus featuring at least one receiving resonator and a housing dimensioned to engage with a battery compartment of a battery-operated device, and a power transmitting apparatus including: a first pair of spaced source resonators, where each source resonator in the first pair features a loop of conducting material surrounding a common first axis; a second pair of spaced source resonators, where each source resonator in the second pair features a loop of conducting material surrounding a common second axis different from the first axis; and a controller coupled to the first and second pairs of source resonators and configured to provide non-radiative wireless power transfer from the power transmitting apparatus to the power receiving apparatus by alternately activating the first and second pairs of source resonators.