Single Layer Multi Mode Antenna for Wireless Power
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Solution Overview
Problem
Existing near-field communication antennas are inefficient due to low quality factors and large sizes, leading to unreliable and inefficient wireless power and data transfer, especially when multiple operating frequencies are required, as they demand precise alignment and proximity between transmitting and receiving antennas.
Innovation Solution
A multi-mode single structure antenna with at least two inductor coils electrically connected in series, capable of operating across various frequency bands including Qi, Rezence, and PMA standards, featuring a compact design that dynamically adjusts operating frequency and inductance through strategic electrical connections and magnetic field shielding to enhance efficiency and reduce size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If prior art antennas are used for near-field communication, then wireless power and data transfer can be achieved, but the transfer efficiency is low and the antenna size is large
Solution Approach 1:
The antenna is divided into multiple inductor coils (first inductor coil and second inductor coil) with different inductance values, allowing each coil to be optimized for specific frequency bands. This segmentation enables efficient operation across multiple modes (Qi, Rezence, PMA standards) while maintaining a compact overall structure.
Solution Approach 2:
The patent utilizes the spatial arrangement of multiple inductor coils in series, where the second coil is positioned within the inner perimeter of the first coil. This dimensional configuration allows the antenna to achieve multiple resonant frequencies and improve transfer efficiency without significantly increasing the footprint area.
2Reliability
If prior art antennas are used for near-field communication, then power transfer can occur, but precise alignment between transmitting and receiving antennas is required
Solution Approach 1:
The antenna is designed with multiple inductor coils that can operate across different frequency bands (100-250 kHz for Qi, 6.78 MHz for Rezence, 13.56 MHz for PMA). This multi-functionality allows the antenna to maintain reliable communication in various operating conditions without requiring precise alignment, as the system can adapt to different resonance conditions.
Solution Approach 2:
The antenna's inductance parameter can be dynamically changed by selecting different inductor coils or combinations thereof. This parameter adjustment capability enables the system to adapt to varying distances and orientations between transmitting and receiving antennas, maintaining reliable communication without strict alignment requirements.
3Adaptability or versatility
If prior art antennas operate at multiple frequency bands, then multiple wireless operations can be supported, but the antenna size increases
Solution Approach 1:
Multiple inductor coils with different inductance values are combined in series within a single antenna structure. This merging allows the antenna to support multiple wireless operations (Qi, Rezence, PMA standards) while maintaining a compact size, as all coils share the same physical space rather than requiring separate antenna elements.
Solution Approach 2:
The second inductor coil is positioned within the inner perimeter of the first inductor coil, creating a nested configuration. This nesting allows multiple functional elements to be packed into a smaller overall footprint, enabling multi-mode operation without proportionally increasing the antenna size.
4Length of moving object
If prior art antennas are used, then near-field communication can be established, but the transmission range is reduced
Solution Approach 1:
The antenna system dynamically selects which inductor coil to use based on the operating frequency and distance requirements. For longer transmission ranges, coils with higher inductance values are selected, while for shorter distances, lower inductance coils provide higher efficiency. This dynamic adaptation allows the system to optimize both range and efficiency for different operating conditions.
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 antenna achieves improved wireless transfer efficiency and increased transmission range with reduced size, enabling reliable operation across multiple frequency bands without the need for precise alignment, thus addressing the inefficiencies of prior art antennas.
Implementation Method 1
Near-field communication enables the transfer of electrical energy and/or data wirelessly through magnetic field induction between a transmitting antenna and a corresponding receiving antenna.
Implementation Method 2
Resonant inductive coupling is defined herein as the near field wireless transmission of electrical energy between two magnetically coupled coils that are part of two spaced apart resonant circuits that are tuned to resonate at the same frequency.
Implementation Method 3
Magnetic resonance is defined herein as the excitation of particles (as atomic nuclei or electrons) in a magnetic field by exposure to electromagnetic radiation of a specific frequency.
Data Source
AI summary
Various embodiments of a single structure multiple mode antenna are described. The antenna is preferably constructed of a single layer having a first inductor coil that is electrically connected in series with a second inductor coil. The antenna is constructed having a plurality of electrical connections positioned along the first and second inductor coils. A plurality of terminals facilitates connection of the electrical connections thereby providing numerous electrical connection configurations and enables the antenna to be selectively tuned to various frequencies and frequency bands.