Patent ID: 11923696
Assignee: GOOGLE LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A passive adapter for magnetic inductive wireless charging, the passive adapter comprising:
a first coil wound to have a first size, the first coil configured to generate an electric current based on exposure of the first coil to a first magnetic field;
a capacitor electrically connected to the first coil, the capacitor configured to store energy based on the electric current generated by the first coil;
a second coil electrically connected to the capacitor and the first coil, the second coil wound to have a second size that is different than the first size of the first coil, the second coil configured to generate a second magnetic field based on the stored energy from the capacitor, the second magnetic field generated to transfer the energy to a receiver coil at a device to wirelessly charge the device, the second coil including a first core material; and
a second core material positioned between the first coil and the second coil, the second core material configured to prevent mutual coupling between the first coil and the second coil, the first core material having a first permeability that is different from a second permeability of the second core material.