Timepiece Antenna Layout for Metal Interference Isolation
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Solution Overview
Problem
In portable electronic devices like wristwatches, the antenna element used for communication is often influenced by other metal members, making it challenging to maintain sensitivity and efficiency in radio wave transmission/reception due to spatial constraints and electromagnetic field interference.
Innovation Solution
A timepiece module design featuring a plate-like antenna extending upright from the circuit board with metal members positioned entirely outside specific regions to minimize electromagnetic interference, including a fixing member that supports the module without overlapping the antenna, ensuring optimal radio wave transmission/reception sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If metal components are arranged near the antenna to save space in compact devices, then device size is reduced, but antenna sensitivity deteriorates due to electromagnetic field interference
Solution Approach 1:
The patent defines three-dimensional exclusion zones around the antenna (first region extending in normal direction, second region coinciding in plan view) to spatially separate metal components from the antenna. This dimensional approach allows compact device design while maintaining antenna sensitivity by preventing harmful electromagnetic interactions through proper spatial arrangement.
2Reliability
If a plate-like antenna is used to increase antenna sensitivity, then communication performance is improved, but more space is required around the antenna, increasing device complexity
Solution Approach 1:
The patent segments the device space into distinct regions: the antenna region, the first region extending in the normal direction, and the second region coinciding in plan view. This segmentation allows clear definition of where metal components should and should not be placed, simplifying the design process while maintaining antenna performance.
3Ease of manufacture
If metal members are placed close to the antenna to reduce device size, then manufacturing cost is reduced, but electromagnetic interference increases affecting communication reliability
Solution Approach 1:
The patent introduces spatial exclusion zones as intermediaries between the antenna and metal components. These zones act as buffers that prevent direct electromagnetic interaction while allowing compact arrangement, thus reducing interference without significantly increasing device size or manufacturing 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
This configuration enhances the sensitivity and stability of radio wave transmission/reception in compact electronic devices by isolating the antenna from other metal components, allowing for efficient communication without significant loss in antenna sensitivity.
Implementation Method 1
an antenna element used for transmission/reception of communication radio waves
Implementation Method 2
the antenna element used for transmission/reception of communication radio waves is likely influenced by other metal members
Data Source
AI summary
A timepiece module includes a circuit board having a first surface, a plate-like antenna and a metal member. The antenna extends in a direction to be away from the first surface of the circuit board. The metal member is entirely disposed outside a first region and outside a second region. The first region extends from a plate surface of the antenna outward in a normal direction of the antenna. The second region coincides with the antenna in plan view viewed from above the first surface.