Wide Dynamic Range Rectifier Array With Adaptive Power Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rectifier circuits have a limited dynamic range due to nonlinearities in diodes and transistors, leading to efficiency degradation as input power levels vary, making it challenging to maintain high efficiency over a wide range of power levels in AC-to-DC and RF-to-DC conversion applications like wireless power transfer and harvesting.
Innovation Solution
A wide dynamic range rectifier array with an adaptive power distribution system that includes multiple rectifier circuits optimized for different power levels and impedance transformation networks, ensuring stable input impedance and low reflection coefficients across varying power levels by dynamically distributing power among rectifier cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rectifier circuits are used, then the circuit structure is simple, but the dynamic range is limited and efficiency degrades as input power levels vary
Solution Approach 1:
The rectifier circuit is divided into multiple parallel branches, each containing a rectifier device optimized for specific power levels. This segmentation allows each branch to handle specific power ranges efficiently, collectively providing wide dynamic range operation while maintaining manageable circuit complexity through modular design
Solution Approach 2:
The circuit employs dynamic impedance transformation networks that automatically adjust impedance matching conditions based on input power levels. This dynamic adaptation enables the circuit to maintain optimal efficiency across varying power levels without requiring manual reconfiguration, resolving the contradiction between adaptability and complexity
2Loss of energy
If impedance matching is optimized for a specific power level, then rectification efficiency is maximized at that level, but efficiency degrades significantly as input power varies away from the optimized level
Solution Approach 1:
Each parallel branch is designed with specific impedance transformation characteristics tailored to particular power levels. This local optimization ensures that each branch maintains high efficiency in its designated power range, while the collective arrangement provides broad power level adaptability, resolving the contradiction between efficiency maximization and power range versatility
Solution Approach 2:
The circuit utilizes power-dependent impedance transformation that automatically adjusts matching parameters based on input power levels. As power levels change, the impedance transformation networks dynamically modify their characteristics to maintain optimal matching conditions, thereby maintaining high efficiency across a wide power range rather than at a single fixed level
3Adaptability or versatility
If multiple rectifier devices are used to cover wide power range, then dynamic range is improved, but impedance matching becomes more challenging due to power-dependent input impedance
Solution Approach 1:
Impedance transformation networks are introduced as intermediary elements between the input and rectifier devices. These networks act as mediators that automatically adjust impedance transformations based on power levels, simplifying the impedance matching process for multiple rectifier devices and enabling wide dynamic range operation without proportionally increasing matching complexity
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 solution achieves high rectification efficiency and overall efficiency over a wide range of input power levels, significantly improving the dynamic range and maintaining high efficiency in wireless power transfer and harvesting systems.
Implementation Method 1
rectifier circuits that converts the AC/RF power to DC
Implementation Method 2
the dynamic impedance of different rectifier cells are transformed as a power level changes
Implementation Method 3
an adaptive power distribution network that delivers the AC or RF input power among these rectifier cells according to the power level
Data Source
AI summary
An adaptive power distribution system is presented for extending the dynamic range of AC/RF rectifiers. The power distribution system distributes the AC/RF input power amongst several different rectifier cells adaptively based on input power level. Consequently, high rectification efficiency can be maintained over a very wide dynamic range.