Antenna Electrode Proximity Sensing for Space-Constrained Wireless Devices
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Solution Overview
Problem
In wireless communication devices like smartphones and tablets, separate sensors are required for specific functionalities, which occupy space and are not efficiently utilized for other purposes.
Innovation Solution
Configuring an antenna to operate both as an antenna and an electrode, allowing it to sense changes in potential and enable proximity sensing functionality, thereby eliminating the need for dedicated sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate sensors are used for specific sensing functionalities, then sensing accuracy is improved, but device complexity and space requirements increase
Solution Approach 1:
The antenna is designed to perform multiple functions: it operates as a traditional antenna for wireless communication and simultaneously functions as an electrode for proximity sensing. This multi-functionality eliminates the need for separate sensing components, reducing device complexity while maintaining sensing capability through the antenna's dual role in both communication and sensing operations
2Measurement precision
If separate sensors are used for specific sensing functionalities, then sensing functionality is achieved, but the area occupied by sensor components increases
Solution Approach 1:
The sensing electrode is merged with the antenna structure, combining two previously separate components into one unified element. This merging allows the antenna to serve both its traditional wireless communication function and the additional proximity sensing function, thereby eliminating the need for separate sensor components and reducing the total area occupied by sensing hardware
3Area of stationary object
If an antenna operates as both antenna and electrode, then space efficiency is improved, but potential interference between functions may occur
Solution Approach 1:
The system dynamically switches between communication mode and sensing mode based on operational requirements. During communication operations, the antenna functions as a traditional radiating element; during sensing operations, it functions as an electrode for detecting proximity objects. This dynamic functional switching minimizes interference between the two modes while maintaining space efficiency
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 approach allows for space-saving integration of sensing capabilities within existing components, enabling effective proximity detection and state determination without additional hardware.
Implementation Method 1
an antenna configured to operate as an antenna and as an electrode... measure a change in the potential between the electrode and a reference potential
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
According to one aspect, there is provided a wireless communication apparatus comprising an antenna configured to operate as an antenna and as an electrode, a reference part configured to provide a reference potential, and a sensor module connected to the electrode and to the reference potential, the sensor module being configured to measure a change in the potential between the electrode and the reference potential.