Embedded Receiving Coil Antenna for Wireless Power Efficiency
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Solution Overview
Problem
The existing wireless power receiving technology faces inefficiencies due to a decreased magnetic field guiding effect caused by voids between the soft magnetic layer and the receiving coil, which affects power transmission efficiency.
Innovation Solution
A receiving antenna structure is designed with a soft magnetic layer and a receiving coil wound in parallel, where the coil's cross-section features one side adjacent to the soft magnetic layer and at least one side forming an inclination with the other sides, minimizing voids and improving electromagnetic energy focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a receiving coil is formed on a soft magnetic layer, then wireless power receiving efficiency is improved, but a void between the soft magnetic layer and the receiving coil decreases the magnetic field guiding effect
Solution Approach 1:
The receiving coil is embedded within the soft magnetic layer, with the coil positioned inside a groove formed on the soft magnetic layer. This nesting structure eliminates the void between the coil and magnetic layer, ensuring continuous magnetic field guidance while maintaining efficient power reception.
Solution Approach 2:
The invention introduces a vertical dimension by forming a groove on the soft magnetic layer and embedding the receiving coil within it. This dimensional change allows the coil to be positioned inside the magnetic layer rather than on its surface, eliminating the void and improving magnetic field coupling.
2Adaptability or versatility
If the receiving antenna thickness is reduced for slim device designs, then adaptability to various electronic devices is improved, but power transmission efficiency may be compromised
Solution Approach 1:
The soft magnetic material is concentrated in the groove region where the receiving coil is embedded, creating a localized high-permeability path. This local quality enhancement ensures efficient magnetic field guidance within the limited thickness space, maintaining power transmission efficiency despite the overall reduced antenna thickness.
Solution Approach 2:
The invention uses thin-film soft magnetic layers with integrated grooves that can be manufactured using flexible fabrication processes. This allows the receiving antenna to achieve slim profiles suitable for modern electronic devices while maintaining functional performance through the embedded coil structure.
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
This configuration enhances power transmission efficiency by improving the magnetic field guiding effect and reducing the thickness of the receiving antenna, making it suitable for various electronic devices, including slim designs, and large-scale applications like electric vehicles.
Implementation Method 1
a receiving antenna of a wireless power receiving apparatus may receive the electromagnetic energy radiated from the transmitting antenna and convert the electromagnetic energy into electrical energy
Implementation Method 2
a soft magnetic material may be arranged near the transmitting antenna and the receiving antenna, and the electromagnetic energy radiated by the transmitting antenna may be focused in a direction of the receiving antenna
Data Source
AI summary
A receiving antenna of a wireless power receiving apparatus for wireless power charging according to one embodiment of the present invention comprises: a substrate; a soft magnetic layer disposed on the substrate; and a receiving coil which is wound in parallel with a plane of the soft magnetic layer and is embedded on one surface of the soft magnetic layer, wherein at least one surface of the receiving coil is slantly embedded on the one surface of the soft magnetic layer.