Planar Resonant Implant Coupler for Power Transfer and Localization
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Solution Overview
Problem
Conventional wireless power transfer methods for implants face challenges with bulky coil antennas, impedance mismatching, and difficulty in identifying implant location, especially for planar subcutaneous or interstitial implants, which are constrained by size and impedance variations due to varying implant depths and dielectric properties.
Innovation Solution
A planar inductive resonant coupler system with loop resonators and metal pads or rings, tuned to maximize quality factor and resonance frequency, allowing efficient energy transfer and location identification using electromagnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional coil antennas are used for wireless power transfer, then power transfer capability is improved, but device size and bulkiness increase
Solution Approach 1:
The patent replaces conventional mechanical coil structures with planar resonant circuits that use electromagnetic resonance for power transfer. This substitution allows achieving the same power transfer function with a significantly reduced physical footprint, as the planar structure can be integrated directly into the implant device without requiring bulky three-dimensional coil windings
Solution Approach 2:
The patent changes the operating parameters by tuning the resonant frequency of the planar circuits to match the external transmitter frequency. By adjusting the capacitance and inductance values in the resonant circuit, the system achieves efficient power transfer at specific frequencies, maintaining high power transfer capability while using a compact planar geometry instead of large coils
2Volume of moving object
If implant size is reduced for compactness, then ease of implantation is improved, but impedance matching becomes more difficult
Solution Approach 1:
The patent incorporates variable capacitors or可调电感 components into the planar resonant circuit, allowing the impedance to be dynamically adjusted after implantation. This enables the system to adapt to different implantation depths and tissue conditions, maintaining optimal impedance matching and power transfer efficiency despite the compact size constraints
Solution Approach 2:
The patent uses tunable resonant circuits where the capacitance and inductance parameters can be adjusted to compensate for impedance variations caused by different implantation depths and orientations. This parameter tuning capability ensures reliable impedance matching even when the implant size is reduced and placed in various positions within the body
3Productivity
If dynamic tuning is added to the implant for impedance matching, then power transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback control system where the implant device automatically monitors its own impedance conditions and adjusts its resonant parameters accordingly. This self-tuning capability eliminates the need for complex external tuning mechanisms while maintaining high power transfer efficiency, as the implant serves itself by detecting and compensating for impedance mismatches
Solution Approach 2:
The patent incorporates feedback circuits that monitor the power transfer conditions and provide real-time information to the resonant circuit control. This feedback mechanism enables automatic adjustment of the resonant frequency and impedance parameters to optimize power transfer efficiency, achieving high productivity without requiring complex manual or external tuning systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves improved impedance matching and resonance quality factors, enabling efficient energy transfer and non-invasive implant location, even with depth variations, using loop resonators and metal pads or rings to enhance power transfer and localization.
Implementation Method 1
the one or more loop resonators are configured to establish electric fields across the gap and are configured to be coupled to circuitry, to receive or to transmit electromagnetic energy to or from a surrounding environment
Implementation Method 2
A planar inductive resonant coupler system with loop resonators and metal pads or rings, tuned to maximize quality factor and resonance frequency
Data Source
AI summary
Provided herein are devices and methods for use of a planar inductive resonant coupler comprising: a planar loop resonator comprising forming a single loop; wherein two or more dimensions of the planar loop resonator are sized to tune a coupler resonance in a gap that forms an inner perimeter of the planar loop resonator; and wherein the planar loop resonator is configured to establish electric fields across the gap and is configured to be coupled to circuitry, to receive or to transmit electromagnetic energy to or from a surrounding environment, and to transmit the electromagnetic energy to the circuitry.