Ring Antenna Structure Using Body Ground for Wearable Range
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Solution Overview
Problem
Wearable electronic devices face challenges with miniaturization due to limited antenna radiation performance, making long-range communication difficult, especially when using coil-type antennas and structural limitations in connection via wired lines.
Innovation Solution
The proposed solution involves a wearable device with a ring-shaped housing that includes a conductive portion on the inner surface electromagnetically coupled to the user's body, using the body as a ground for the antenna, thereby enhancing radiation performance without the need for a separate ground structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a coil-type antenna is used in a wearable device, then the device can be miniaturized, but the antenna radiation performance deteriorates making long-range communication difficult
Solution Approach 1:
The patent merges the antenna structure with the user's body by using the body as a ground reference. The conductive portion is disposed on or near the user's body, and the antenna uses the body's electrical properties to form part of the antenna system, thereby achieving both miniaturization and improved radiation performance
Solution Approach 2:
The patent introduces the user's body as an intermediary element between the antenna and the ground. The body acts as a mediator that enables electromagnetic coupling, allowing the antenna to achieve better radiation performance without requiring a separate ground structure
2Reliability
If a separate ground structure is added to improve antenna radiation performance, then communication range improves, but device complexity and size increase
Solution Approach 1:
The patent makes the user's body serve multiple functions: it acts as both the ground reference for the antenna and as part of the antenna radiating structure. This eliminates the need for a separate ground structure while maintaining communication range
Solution Approach 2:
The patent enables the antenna system to use the user's body itself as the ground structure, rather than requiring an external ground component. The body naturally provides the electrical reference needed for antenna operation
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 improves antenna radiation performance, allowing for better communication with external devices at a distance and enables a more compact design by eliminating the need for a separate ground structure.
Implementation Method 1
a conductive portion on the inner surface electromagnetically coupled to the user's body
Data Source
AI summary
A wearable device is provided. The wearable device includes a housing with a ring-shape including an inner surface and an outer surface, a first layer between the inner surface and the outer surface, including a printed circuit board (PCB), a second layer between the outer surface and the first layer, including a conductive portion, at least one circuit for wireless communication attached to the PCB, another conductive portion formed in a portion of the inner surface, a first coupling member for electrically connecting the conductive portion and the another conductive portion, and a second coupling member for electrically connecting the conductive portion and the at least one circuit, wherein the at least one circuit is configured to communicate with an external electronic device by using the conductive portion obtaining a signal fed from the at least one circuit and the another conductive portion coupled to a ground.