Cylindrical Wearable Antenna Design with Insulating Emission Slit
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Solution Overview
Problem
Wearable devices with metal cases face challenges in antenna placement due to space constraints, electrical interference, and maintaining emission efficiency, making it difficult to integrate antennas effectively.
Innovation Solution
A wireless communication device with a cylindrical case and non-metallic regions in the cover members allows for an insulating member to fill gaps, creating an electrical slit that serves as an emission port for electromagnetic waves, minimizing interference and maintaining flexibility in design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the antenna is attached on the outside of the wearable device, then the antenna can be easily installed, but the antenna may be damaged when worn and requires additional waterproofing and electrically conductive structures
Solution Approach 1:
The patent embeds the antenna inside the wearable device case, nesting it within the protective housing. The antenna is positioned in the internal space between the first and second cover members, eliminating external attachment while maintaining functionality through the insulating member that allows electromagnetic wave passage.
2Volume of moving object
If the antenna is disposed inside a compact wearable device with metal case, then the device can be more compact and protected, but there are many restrictions on antenna layout due to space constraints, electrical interference, and emission efficiency requirements
Solution Approach 1:
The patent applies local quality by creating a specific non-metallic region in the second cover member that corresponds to the antenna position. This localized modification allows electromagnetic waves to pass through without interference from the metal case, while the rest of the case maintains its protective metal structure. The insulating member with electrical slit provides localized electromagnetic wave passage capability.
Solution Approach 2:
The patent segments the case structure into distinct functional regions: the metal case body for protection, the insulating member for electromagnetic wave transmission, and the non-metallic region in the second cover member for antenna signal emission. This segmentation allows each component to optimize its specific function without compromising overall device compactness.
3Strength
If metal materials are used in the case, then the device has better strength and protection, but metal interference reduces antenna emission efficiency
Solution Approach 1:
The patent introduces an insulating member as an intermediary between the metal case and the antenna. This insulating member with its electrical slit acts as a mediator that allows electromagnetic waves to pass through while isolating the antenna from direct metal interference. The insulating member bridges the conflicting requirements of metal case strength and antenna emission efficiency.
Solution Approach 2:
The patent creates a localized non-metallic region in the second cover member corresponding to the antenna position, allowing electromagnetic waves to pass through without metal interference. This localized modification preserves the overall metal case structure for strength while eliminating interference in the critical emission region.
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 enables secure emission ports for electromagnetic waves while preventing a reduction in emission efficiency, allowing for compact and efficient antenna placement within wearable devices.
Implementation Method 1
an electrical slit is formed in the gap. Thus, according to the wireless communication device, an emission port for electromagnetic waves transmitted and received by the antenna circuit can be secured
Implementation Method 2
the first cover member includes a light-transmitting material that allows light from the display to pass through
Data Source
AI summary
A wireless communication device comprising: a case having a substantially cylindrical shape and including a first opening at a front surface and a second opening at a back surface, respectively; a first cover member that blocks at least a portion of the first opening;a second cover member that blocks at least a portion of the second opening; an insulating member that fills a gap between the first cover member and the case; a display; a substrate housed by the case; an antenna circuit installed on the substrate; and a communication circuit installed on the substrate and electrically connected to the antenna circuit, wherein the case includes a metal material; and the first cover member includes a light-transmitting material that allows light from the display to pass through.