Higher Order Spherical Mode Antennas for Near-Field Wireless Power Transfer
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Solution Overview
Problem
Conventional near-field wireless power transfer systems are limited to fundamental spherical modes, which restrict the efficiency of power transfer between antennas, and do not effectively utilize higher order spherical modes for enhanced power transfer efficiency.
Innovation Solution
A system and method that allow the first and second antennas to have spherical modes with orders greater than or equal to an integer greater than 1, utilizing scattering matrixes, mode coefficients conversion, and Z-parameters to achieve maximum power transfer efficiency by controlling the phase difference between the antennas' current flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If fundamental spherical modes are used in near-field wireless power transfer, then the system complexity is low and ease of manufacture is good, but the power transfer efficiency is limited and insufficient
Solution Approach 1:
The patent changes the spherical mode order parameter from fundamental modes (order 1) to higher order modes (order ≥2). This parameter change enables the system to achieve significantly improved power transfer efficiency by utilizing higher order spherical modes that provide better coupling characteristics between antennas, while maintaining the same basic antenna structure and operation principle.
2Loss of energy
If higher order spherical modes are utilized, then the power transfer efficiency is significantly enhanced, but the analysis and calculation complexity increases
Solution Approach 1:
The patent employs feedback mechanisms through scattering matrix measurements and mode coefficient calculations to characterize and optimize the higher order mode interactions. By measuring the scattering parameters and calculating the mode coefficients, the system can determine the coupling between antennas and adjust operating conditions to maximize power transfer efficiency while managing the increased complexity through systematic measurement and calculation procedures.
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 significantly enhances the power transfer efficiency by using higher order spherical modes, increasing the efficiency of wireless power transfer compared to conventional systems using fundamental modes, as demonstrated by simulations and experiments with TM01 and TM02 mode antennas.
Implementation Method 1
near-field wireless power transfer and near-field communication are receiving much attention and are being widely studied... transmit power wirelessly in the near-field region using antennas generating mostly a fundamental spherical mode
Data Source
AI summary
The present invention relates to a system for transferring wireless power or signal. The system includes a first antenna; and a second antenna which is located from the first antenna at an arbitrary distance and arranged in an arbitrary direction in comparison with the first antenna, wherein respective spherical modes of the first antenna and the second antenna are allowed to have orders which are same as or larger than a predetermined value to thereby transfer wireless power between the first antenna and the second antenna.