Wireless Watch Antenna Sensitivity via Housing Opening
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Solution Overview
Problem
Wireless function watches with metal exteriors face challenges in receiving radio waves due to shielding effects, resulting in insufficient sensitivity, and existing solutions compromise on appearance or structural integrity.
Innovation Solution
A wireless function watch design featuring a conductive projecting portion with an opening that allows radio waves to pass through, improving antenna sensitivity while maintaining a full-metal structure and aesthetic appeal, using openings and slits to separate the antenna from conductive components and incorporating insulating members for enhanced reception and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the housing is made of metal material to achieve high-class appearance, then esthetic appearance is improved, but receiving sensitivity of the antenna deteriorates due to shielding effect
Solution Approach 1:
The housing is segmented into conductive and non-conductive portions. The dial plate is made of non-conductive material while the case may be conductive, allowing the antenna to receive radio waves without shielding while maintaining metal appearance in other areas.
Solution Approach 2:
Different parts of the housing have different material properties. The dial plate area is specifically made non-conductive to allow radio wave transmission, while other parts of the housing can maintain conductive metal material for aesthetic purposes.
2Shape
If the dial plate is made of metal material to achieve high-class appearance, then esthetic appearance is improved, but receiving sensitivity of the antenna deteriorates due to shielding effect
Solution Approach 1:
The dial plate is specifically made of non-conductive material at the location where radio wave transmission is needed, while other parts of the housing can maintain conductive metal material for aesthetic purposes.
3Reliability
If non-metal material is used for dial plate to improve receiving sensitivity, then receiving sensitivity is improved, but esthetic appearance deteriorates
Solution Approach 1:
Only the dial plate area requires non-conductive material for radio wave transmission, while the rest of the housing can maintain conductive metal material for aesthetic purposes.
4Strength
If metal members are disposed around the antenna to achieve full-metal structure, then structural strength is improved, but receiving sensitivity deteriorates due to magnetic field absorption
Solution Approach 1:
The dial plate area is specifically designed as non-conductive to prevent magnetic field absorption, while other structural parts of the housing can maintain conductive metal material for strength and aesthetics.
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 design enhances receiving sensitivity of the antenna without shielding, maintains a high-class appearance, and ensures excellent strength and wearability, even with a full-metal structure, without increasing the watch's thickness.
Implementation Method 1
an antenna core portion 106 transmits the wave 104, then a magnetic field is generated around the antenna 102, and an electric current is generated in an antenna coil 108
Implementation Method 2
A wireless function watch design featuring a conductive projecting portion with an opening that allows radio waves to pass through, improving antenna sensitivity while maintaining a full-metal structure
Data Source
AI summary
A wireless function watch includes an antenna for receiving a radio wave from outside; a housing for accommodating the antenna; a conductive projecting portion projecting in a planar direction from an inner wall of the housing toward the inside of a watch case; and an opening penetrating the conductive projecting portion vertically so as to improve receiving characteristics of the antenna.