Dynamic Impedance Matching for Wireless RF Power Reception
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Solution Overview
Problem
Existing wireless power systems face inefficiencies in power reception due to varying RF input fields and impedance mismatch between antennas and downstream components, leading to reflection and limited power handling capacity.
Innovation Solution
A system comprising dynamic impedance matching and RF-DC conversion, which includes tunable impedance networks, power measurement modules, and control algorithms to optimize impedance matching and power conversion, enabling efficient power reception and delivery to arbitrary RF and DC loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If dynamic impedance matching is implemented, then power reception efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic impedance matching by making the impedance network tunable and adjustable in real-time based on received signal conditions. The system continuously adapts impedance parameters to match varying RF input fields, transforming a static matching network into a dynamic one that optimizes power transfer efficiency under different operating conditions.
Solution Approach 2:
The patent incorporates feedback mechanisms where power measurement modules monitor the received power and system performance, then feed this information back to control algorithms that adjust the impedance matching parameters. This closed-loop feedback system enables automatic optimization of power reception efficiency without manual intervention.
2Loss of energy
If impedance matching is optimized for specific conditions, then power reception efficiency is improved, but adaptability to arbitrary RF power sources deteriorates
Solution Approach 1:
The patent designs the impedance matching network with tunable parameters that can be adjusted across a wide range of values, enabling the same hardware to adapt to multiple different RF power sources with varying characteristics. The universal design allows the system to handle arbitrary RF inputs by reconfiguring the matching network parameters according to the specific source characteristics.
Solution Approach 2:
The patent employs parameter changes in the impedance matching network, where key electrical parameters such as resistance, inductance, and capacitance values are dynamically adjusted based on the characteristics of the connected RF power source. This parameter variability enables the system to optimize performance for different source impedances and frequency ranges.
3Measurement precision
If power measurement and control algorithms are added, then power delivery precision is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service functionality where the system automatically measures its own power reception and delivery parameters using integrated power measurement modules. The control algorithms autonomously process this data and adjust system parameters without external intervention, enabling the system to self-optimize its performance while managing complexity through integration.
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 efficient power reception and delivery by dynamically tuning impedance, reducing reflection and variance in input current and voltage, thereby increasing overall system efficiency and enabling reception of arbitrary RF power sources.
Implementation Method 1
receiving RF power wirelessly from an antenna
Implementation Method 2
dynamically tuning an input impedance of a dynamic impedance match
Implementation Method 3
RF-DC converters
Data Source
AI summary
A system for wireless power reception, preferably including one or more: antennas, dynamic impedance matches, RF-DC converters, DC impedance converters, and/or DC power outputs. A method for wireless power reception, preferably including: receiving power wirelessly at an antenna, dynamically adjusting an input impedance of a dynamic impedance match coupled to the antenna, and/or delivering the power to a load.