Wireless Power Receiver Coil Inductance Tuning

The patent applies dynamics by making the receiving coil's inductance adjustable rather than fixed. A switch connects different portions of the receiving coil to ground, dynamically changing the effective inductance value. This allows the receiver to adapt its electrical characteristics to match different transmission frequency bands, resolving the contradiction between maintaining reliable power reception and adapting to frequency changes.

The patent changes the electrical parameter (inductance) of the receiving coil based on the detected frequency band. When a frequency change is detected, the controller activates specific switches to alter the coil's inductance, thereby tuning the receiver to operate optimally at the new frequency. This parameter adjustment enables the receiver to maintain reliable operation across different frequency bands.

The patent makes a single receiving coil multi-functional by enabling it to operate at multiple frequency bands through dynamic inductance adjustment. Instead of requiring separate coils for different frequencies, one coil is designed to serve multiple purposes by changing its electrical characteristics. This universal approach reduces device area while maintaining broad frequency band coverage.

The patent implements a nested structure where different sections of the receiving coil can be selectively activated. The coil is designed with tap points that allow portions of the coil to be connected or disconnected, creating a nested configuration where inner sections can be used for high-frequency operation while outer sections are engaged for low-frequency operation, all within a single physical coil structure.