Anchor-Shaped Antenna Misalignment Resilience
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Solution Overview
Problem
Existing near-field antenna designs face challenges in maintaining power transfer efficiency due to lateral and angular misalignments between transmitter and receiver antennas, limiting their application in systems requiring planar structures or high power consumption.
Innovation Solution
The integration of anchor-shaped antennas with fabric surfaces, featuring semi-enclosing structures and central bars, which extend the fringing field and inhibit the effects of positional misalignments, allowing for resilient wireless power transfer and harvesting systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional loop-shaped antennas are used for wireless power transfer, then the system structure is simple, but the power transfer efficiency deteriorates under lateral and angular misalignments
Solution Approach 1:
The patent applies asymmetry by transitioning from symmetric conventional loop-shaped antennas to asymmetric anchor-shaped antennas. The anchor shape with its extended fringing field structure creates asymmetric field distribution that inherently provides broader coupling tolerance, resolving the contradiction by sacrificing geometric symmetry for improved misalignment resilience while maintaining manufacturing simplicity
Solution Approach 2:
The patent extends the antenna structure from a simple planar loop to an anchor shape that effectively utilizes extended fringing fields in additional spatial dimensions. This dimensional extension of the electromagnetic field interaction volume allows the antenna to maintain coupling efficiency across larger misalignment ranges without complicating the basic planar structure
2Length of stationary object
If intermediate relay coils are introduced to extend coupling distance, then the transfer distance is increased, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the single antenna structure into two functional components: the anchor-shaped antenna that generates extended fringing fields and the conventional loop antenna that receives power. This segmentation allows the system to achieve extended coupling distance through the unique field characteristics of the anchor shape without requiring multiple relay coils, thus reducing overall system complexity
Solution Approach 2:
The patent changes the geometric parameters of the antenna structure by adopting the anchor shape with specific dimensional ratios that optimize fringing field extension. This parameter change enables the system to achieve longer coupling distances by modifying the antenna geometry itself rather than adding intermediate relay components, thereby avoiding increased device complexity
3Reliability
If 3D omni-directional antenna configurations are used to overcome misalignment, then angular misalignment tolerance is improved, but the antenna cannot be integrated with planar surfaces
Solution Approach 1:
The patent applies curvature principles by designing the anchor-shaped antenna with curved fringing field extensions that radiate in multiple directions. This curved geometry creates an omni-directional like field pattern within the planar constraint, achieving angular misalignment tolerance similar to 3D configurations while maintaining compatibility with planar surface 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 anchor-shaped antennas provide enhanced power transfer efficiency and resilience to misalignments, achieving higher efficiency compared to conventional loop-shaped antennas, with the ability to maintain performance across various degrees of lateral and angular misalignments.
Implementation Method 1
The anchor-shaped antenna can be configured to have an extended fringing field extending outside an aperture of the antenna
Implementation Method 2
The shape of an anchor can be configured to inhibit effects of lateral or angular positional misalignments of the transmitter antenna or the receiver antenna upon power transfer efficiency
Data Source
AI summary
A wireless power transfer and harvesting system that can be integrated with fabric is provided. The wireless power transfer and harvesting system includes a transmitter antenna for wirelessly transferring power and a receiver antenna operatively coupled to the transmitter antenna for receiving the power. At least one of the transmitter antenna and the receiver antenna can be formed with a shape of an anchor to inhibit effects of lateral and/or angular positional misalignments of the transmitter antenna or the receiver antenna upon power transfer efficiency of the system.