Wearable Antenna Frame-Bezel Connector Layout for Consistent Radiation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Smart wearable devices, such as smart watches, face issues with antenna consistency and performance due to the electrical isolation between the metal frame and bezel, which leads to unpredictable electrical contact points during use, affecting the functionality of the device.
Innovation Solution
The implementation of a wearable device with a metal frame and bezel electrically connected through a plurality of connectors, where the distance between adjacent connectors is less than ¼ of the wavelength corresponding to the maximum operating frequency, ensuring consistent antenna performance even with additional electrical contact points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the metal frame and bezel are electrically isolated, then the antenna structure is simpler, but the antenna consistency deteriorates due to unpredictable electrical contact points
Solution Approach 1:
The electrical connection between the metal frame and bezel is segmented into multiple discrete connectors distributed around the perimeter, rather than a single continuous connection. This segmentation allows controlled electrical contact at specific locations, improving antenna consistency while maintaining structural simplicity.
Solution Approach 2:
The electrical connection points between the metal frame and bezel are predetermined and pre-positioned through the connector arrangement. This preliminary action eliminates unpredictable contact points, ensuring consistent antenna performance from the outset.
2Reliability
If multiple connectors are added between the metal frame and bezel, then the antenna consistency improves, but the device complexity increases
Solution Approach 1:
The multiple connectors are merged into a unified distributed arrangement around the metal frame perimeter. This combining approach achieves improved antenna consistency through multiple connection points while avoiding the complexity of independent, scattered connectors by establishing a regular, predictable pattern.
3Reliability
If the distance between adjacent connectors is reduced below 1/4 wavelength, then the radiation performance improves, but the manufacturing precision requirements increase
Solution Approach 1:
The connector spacing parameter is specifically set to be less than 1/4 of the wavelength corresponding to the maximum operating frequency. This parameter change optimizes the radiation performance by preventing clutter interference, while the specific threshold provides a clear manufacturing guideline.
Solution Approach 2:
The connector arrangement is designed in advance to preemptively prevent clutter interference in the radiation pattern. By establishing the spacing constraint before manufacturing, the design anticipates and prevents potential performance degradation from improper spacing.
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 design enhances antenna consistency and radiation performance by optimizing the number and position of electrical connection points, preventing clutter interference and maintaining performance across various frequency ranges.
Implementation Method 1
the gap between the metal frame and the mainboard of the wearable device forms an antenna of the wearable device
Implementation Method 2
the other end of the metal spring piece abuts elastically against an inner wall of the lug of the metal bezel
Data Source
AI summary
Provided are a wearable device, comprising: a metal frame, a gap between the metal frame and a mainboard of the wearable device forming an antenna of the wearable device; and a metal bezel, the metal bezel and the metal frame being electrically connected to each other through a plurality of connectors, a distance between any adjacent two of the connectors along a first direction being less than ¼ of a wavelength corresponding to a maximum operating frequency of one or more antennas of the wearable device, and the first direction being a peripheral direction of the metal frame.