Rotating Antenna in Wearable Watch with Non-Conductive Hands
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Solution Overview
Problem
Wearable devices with integrated antennas face interference from watch hand elements, which can disrupt wireless communications due to their conductive nature, and existing designs do not effectively manage these interferences to optimize communication efficiency across multiple frequency ranges.
Innovation Solution
A wearable device design featuring watch hand elements made of non-conductive materials or coated with non-conductive vacuum metallization, combined with an antenna element that rotates 360 degrees and a matching circuit, allowing for efficient wireless communication across Bluetooth, Wi-Fi, and other frequency ranges by minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If watch hand elements are made of conductive materials, then the structure is simple and manufacturing is easy, but wireless communication is interfered with
Solution Approach 1:
The patent changes the electrical conductivity parameter of the watch hand elements by coating them with non-conductive vacuum metallization. This modifies the material property from conductive to non-conductive, thereby eliminating the harmful electromagnetic interference with the antenna while maintaining the visual and functional appearance of the watch hands.
Solution Approach 2:
The patent uses composite material construction by combining traditional watch hand materials with a non-conductive vacuum metallization coating. This composite structure maintains the mechanical properties of the base material while adding the electromagnetic shielding property of the non-conductive coating, resolving the contradiction between manufacturing simplicity and communication interference.
2Productivity
If antenna element rotates 360 degrees, then communication efficiency is improved across multiple frequency ranges, but device complexity increases
Solution Approach 1:
The patent makes the antenna element multi-functional by enabling it to rotate 360 degrees, allowing the same physical component to serve multiple communication frequency ranges (Bluetooth, Wi-Fi, etc.). This universal design improves communication efficiency without requiring separate fixed antennas for each frequency band.
Solution Approach 2:
The patent transitions the antenna from a static fixed position to a dynamic rotating component that can change its orientation relative to the watch face. This dynamic capability allows the antenna to optimize its radiation pattern for different frequency ranges while maintaining a compact form factor, balancing improved communication efficiency with acceptable device complexity.
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 solution ensures reduced interference and enhanced communication efficiency, with the antenna achieving return loss less than -6 dB and efficiency ranging from 55% to 90% across specified frequency ranges, effectively supporting multiple wireless communication protocols.
Implementation Method 1
an antenna element coupled to the shaft and configured to rotate 360 degrees in the same plane about the shaft; and a matching circuit matching with the antenna element
Data Source
AI summary
A wearable device includes a dial extending a shaft; two watch hand elements coupled to the shaft and configured to rotate 360 degrees in a plane about the shaft; an antenna element coupled to the shaft and configured to rotate 360 degrees in the same plane about the shaft; and a matching circuit matching with the antenna element.