Metal Accessory Antenna Slit Design for Wireless Signal
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Solution Overview
Problem
Conventional metal accessories with non-contact short-range wireless communication functions require insulating materials to prevent signal interference, limiting their manufacture to non-conductive materials like plastic or ceramics, which restricts their use to metal or precious metal materials.
Innovation Solution
A metal accessory with a loop-shaped body made of metal or precious metal, featuring a through hole and slits for mounting an integrated circuit element and loop antenna, where the slits are charged with electrical insulating material or treated for oxidation to prevent signal interference, allowing for non-contact short-range wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the loop antenna is wound on a metal material, then the accessory can be manufactured of metal or precious metal, but the metal material decreases signal strength and prevents non-contact short-range wireless communication
Solution Approach 1:
The patent divides the loop antenna into multiple separate conductive elements (first, second, third, and fourth conductive portions) that are positioned at different locations on the metal accessory body. These segmented elements work together to form the antenna function while being spatially distributed to minimize mutual interference and reduce the harmful effects of metal on signal strength.
Solution Approach 2:
The patent applies different material properties to different parts of the accessory. The main body is made of metal or precious metal for aesthetic and durability purposes, while the antenna elements are made of conductive materials with specific electrical properties. The conductive portions are strategically placed and dimensioned to optimize wireless communication while minimizing metal interference in critical signal areas.
2Reliability
If the body is made of electrical insulating material, then non-contact short-range wireless communication can be performed smoothly, but the accessory cannot be manufactured of metal or precious metal material
Solution Approach 1:
The loop antenna is segmented into multiple conductive portions distributed throughout the metal accessory body. This segmentation allows the antenna function to be achieved through cooperative interaction of separate elements rather than a continuous loop, reducing the impact of metal material on signal strength while maintaining wireless communication capability.
Solution Approach 2:
The patent introduces conductive portions as intermediary elements that mediate between the metal accessory body and the wireless communication function. These conductive portions serve as the active antenna elements that interact with electromagnetic fields, while the metal body provides structural support and aesthetic appearance without directly interfering with the antenna function.
3Device complexity
If the loop antenna is made as a continuous loop, then the antenna structure is simple, but the metal material causes signal interference and prevents induced current generation
Solution Approach 1:
The continuous loop antenna structure is replaced with multiple discrete conductive portions positioned at different locations. Each conductive portion contributes to the overall antenna function, and their distributed arrangement reduces signal interference caused by the metal body while maintaining structural simplicity.
Solution Approach 2:
The patent transitions from a two-dimensional continuous loop structure to a three-dimensional distributed arrangement of conductive portions throughout the accessory body. This spatial distribution in multiple dimensions allows the antenna to function effectively while minimizing interference from the metal material.
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
Enables the manufacture of metal accessories with non-contact short-range wireless communication functions while maintaining a metal or precious metal appearance, enhancing signal strength and functionality.
Implementation Method 1
the loop antenna produces induced current by the non-contact short-range wireless communication and provides the IC chip with the induced current
Data Source
AI summary
A metal accessory having a non-contact communication function, includes: an integrated circuit element (IC chip) for control, capable of performing non-contact short-range wireless communication with an external terminal; a loop antenna with a predetermined length, having both ends connected respectively to both ends of the integrated circuit element for control; and a body part, which is made of a metal or precious metal material, is formed into a loop shape having a through hole formed through the center thereof, and has a slit formed by cutting a partial section of the loop. The integrated circuit element for control and the loop antenna are provided inside the body part, the loop antenna is wound several times along the loop-shaped body part, and a portion of the loop-shaped body part is completely cut by the slit.