Coreless Coil Antenna with Magnetic Plate and Adhesive Layer
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Solution Overview
Problem
Antennas for small-power wireless communications face challenges such as increased thickness, breakage of thin conductor wires, and high costs due to the use of printed coils, which are not easily connectable to other circuits and lack flexibility for curved surfaces.
Innovation Solution
A coreless coil antenna design using a conductor wire with a relay member and a magnetic plate member, where the coil and relay member are fixed to an adhesive layer, and the internal terminal portions are positioned within the magnetic member or its notch, allowing for thin, flexible, and cost-effective construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If printed coils are used to reduce thickness, then the antenna becomes thinner, but the conductor wires become prone to breakage and connection to other circuits becomes difficult
Solution Approach 1:
The antenna structure is divided into distinct functional layers: the coil layer with conductor wires, the magnetic plate member layer for magnetic flux concentration, and the adhesive layer for bonding. This segmentation allows each layer to be optimized independently - the coil layer maintains thin profile while the magnetic plate provides structural support and flux management, preventing conductor wire breakage without increasing overall thickness
Solution Approach 2:
The antenna employs a composite structure combining conductor wires (for electromagnetic induction), magnetic plate member (for magnetic flux concentration and shielding), and adhesive layer (for mechanical bonding). This composite approach enables the thin conductor wires to be protected and supported by the magnetic plate member, significantly improving durability while maintaining the thin profile necessary for modern devices
2Length of moving object
If printed coils are used to reduce thickness, then the antenna becomes thinner, but manufacturing cost increases
Solution Approach 1:
The invention replaces expensive printed coil structures with a more economical assembly of standard conductor wires, magnetic plate members, and adhesive layers. This approach uses readily available, low-cost components that can be manufactured through simple lamination processes rather than complex printed circuit board fabrication, significantly reducing manufacturing costs while achieving the same thin profile
Solution Approach 2:
The invention changes the manufacturing approach from printed circuit technology to lamination assembly technology. By transitioning from etching metal traces on substrates to laminating pre-fabricated components, the manufacturing process becomes simpler, more flexible, and cost-effective, especially for small-volume or customized production runs
3Length of moving object
If printed coils are used to reduce thickness, then the antenna becomes thinner, but flexibility for curved surfaces is reduced
Solution Approach 1:
The antenna structure uses thin-film adhesive layers to bond the coil and magnetic plate member, creating a flexible composite structure. The thin profile enabled by this lamination approach allows the antenna to conform to curved surfaces and irregular shapes, providing the flexibility needed for modern mobile devices with curved displays and non-planar surfaces
4Length of moving object
If thin conductor wires are used to maintain thin profile, then the antenna remains thin, but the wires are easily broken
Solution Approach 1:
The magnetic plate member serves as an intermediary structural element that supports and protects the thin conductor wires. By positioning the magnetic plate member adjacent to the coil layer, it provides mechanical reinforcement without interfering with the electromagnetic function, effectively acting as a protective mediator that prevents wire breakage while maintaining the thin overall 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
The design results in a thin, flexible, and cost-effective antenna that is easily connectable to other circuits, resistant to breakage, and capable of maintaining effective communication distances while minimizing thickness and material costs.
Implementation Method 1
a first antenna 1a for near-field wireless communications, which radiates electromagnetic waves to form a magnetic field around the antenna apparatus 280
Implementation Method 2
a magnetic plate member 30 formed on a metal shield 26... Because a magnetic flux 250 generated by the coil 10 passes mainly through the magnetic member 30
Implementation Method 3
the coil and part of the relay member disposed on the magnetic member being fixed to a first adhesive layer
Data Source
AI summary
An antenna comprising a coreless coil formed by winding a conductor wire, a relay member connected to the coil, and a magnetic plate member covering the coil and part of the relay member; the relay member comprising a substrate having a notch for lead wires of the coil, and a pair of terminal members formed on the substrate; each terminal member comprising an internal terminal portion connected to an end of each lead wire, an external terminal portion connected to an external circuit, and a line portion connecting the internal terminal portion to the external terminal portion; the coil and part of the relay member disposed on the magnetic member being fixed to a first adhesive layer on the non-transmission side of the coil; and the internal terminal portion being positioned in a region overlapping the magnetic member, or in a region surrounded by the notch of the magnetic member.