Arc-Shaped Antenna Plates for Wearable Signal Optimization
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Solution Overview
Problem
Wearable device antennas face performance challenges due to the proximity of the human body, which affects their characteristics and interferes with signal transmission for Wi-Fi, GPS, and mobile communications.
Innovation Solution
An antenna device with a ground plate and two arc-shaped antenna plates, each with a feed terminal, positioned close together to form a gap, allowing for adjustable configurations to optimize performance across various frequency ranges while minimizing tissue impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna device is placed close to the human body for wearable application, then the device can be worn by users, but the antenna performance deteriorates due to body interference
Solution Approach 1:
The antenna device is divided into multiple antenna elements (first antenna element, second antenna element, third antenna element) that can be independently configured and adjusted. Each element can be separately tuned to optimize performance at different frequencies and reduce mutual interference, thereby maintaining reliable antenna performance in the constrained wearable environment.
Solution Approach 2:
The antenna device incorporates adjustable antenna elements with variable electrical lengths and configurations. The antenna parameters can be dynamically adjusted to adapt to different wearable positions and body proximities, allowing the system to maintain optimal performance despite changes in the electromagnetic environment caused by body interference.
2Volume of moving object
If the antenna device is made compact for wearable use, then the device size is reduced, but the antenna characteristics are affected
Solution Approach 1:
Multiple antenna elements are nested within a compact structure where the first, second, and third antenna elements are arranged in a space-efficient configuration. The antenna elements are positioned at different spatial locations and orientations within the same housing, allowing full antenna functionality to be achieved in a reduced volume suitable for wearable devices.
Solution Approach 2:
The antenna elements utilize three-dimensional spatial arrangement rather than simple planar expansion. By distributing antenna elements in different spatial dimensions and orientations within the compact housing, the design achieves adequate antenna characteristics without increasing the overall device volume, resolving the contradiction between compactness and antenna performance.
3Adaptability or versatility
If multiple antenna elements are added to support Wi-Fi, GPS and mobile communication, then the frequency coverage is improved, but the device complexity increases
Solution Approach 1:
The antenna device employs multiple antenna elements that can operate across different frequency bands (Wi-Fi, GPS, mobile communication) simultaneously. Each antenna element is designed to be multi-functional, capable of supporting various communication protocols and frequency ranges, thereby achieving broad frequency coverage without proportionally increasing system complexity through specialized dedicated antennas for each function.
Data Source
AI summary
An antenna device for radio communications in a wearable device comprises a ground plate (7) having an arc shape, a first antenna plate (1) extending essentially parallel to the ground plate and connected thereto at a first end portion (7a) of the ground plate, the first antenna plate having a first feed terminal (4), and a second antenna plate (2) extending essentially parallel to a the ground plate and connected thereto at a second end portion (7b) of the ground plate opposite to the first end portion of the ground plate, the second antenna plate having a second feed terminal (5)A gap (6) is provided between the first antenna plate (1) and the second antenna plate (2).