Wearable Antenna Patch Layout for Touch Sensing and Body Interference
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Solution Overview
Problem
As wearable electronic devices miniaturize, the separation of antenna patterns from touch patterns can lead to interference with the user's body, reducing antenna performance and efficiency.
Innovation Solution
The use of a single conductive patch as both the antenna radiator and touch pattern, with the wireless communication circuit supplying power to a specific point spaced apart from the edge of the conductive patch to receive RF signals, and the touch sensing circuit detecting touch inputs, minimizes interference with the user's body and maintains antenna radiation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the antenna pattern is spaced apart from the touch pattern to avoid interference, then the touch sensing accuracy is improved, but the antenna performance is reduced due to interference with the user's body
Solution Approach 1:
The patent combines the antenna pattern and touch pattern into a single conductive patch structure. The conductive patch serves dual functions: as an antenna radiator for wireless communication and as a touch sensing electrode for detecting user input. This merging eliminates the need to separate the two patterns, allowing the touch function to be maintained while the antenna is positioned away from the user's body to preserve its performance.
Solution Approach 2:
The conductive patch is designed to perform multiple functions simultaneously. It acts as both the radiating element for the antenna and the sensing electrode for touch detection. This multi-functionality allows the system to maintain accurate touch sensing without compromising antenna performance, as the single structure can be optimally positioned for antenna function while still providing adequate touch sensitivity.
2Object-generated harmful factors
If the antenna pattern is spaced apart from the touch pattern, then the touch pattern interference is reduced, but the antenna radiation efficiency is reduced due to body interference
Solution Approach 1:
By merging the antenna and touch pattern into one conductive patch, the design eliminates touch pattern interference while maintaining antenna radiation efficiency. The unified structure allows the antenna to be positioned optimally away from the user's body, reducing energy loss from body interference.
3Device complexity
If the antenna and touch pattern are integrated into a single conductive patch, then the device complexity is reduced, but the functional separation is compromised
Solution Approach 1:
The single conductive patch is designed to perform multiple functions independently through selective electrical connections. The antenna function and touch sensing function are both enabled through the same structure but can be activated independently through different circuit connections, maintaining functional versatility while simplifying the overall device design.
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 reduces interference with the human body, enhances antenna radiation efficiency, and increases user convenience by allowing for swipe input identification and configured functions through additional conductive patterns.
Implementation Method 1
supply power to a first point spaced apart from an edge of the conductive patch by a specific distance or more to receive a radio frequency (RF) signal
Implementation Method 2
the first touch sensing circuit is configured to detect a touch input to the conductive patch
Data Source
AI summary
A wearable electronic device is provided. The wearable electronic device includes a housing, a conductive patch, a printed circuit board (PCB) disposed in the housing, a wireless communication circuit disposed on the PCB and a first touch sensing circuit, wherein the housing may comprise a first housing facing away from the body wearing the electronic device, and a second housing facing toward the body. The wireless communication circuit supplies power to a first point spaced apart from an edge of the conductive patch by a specific distance or more and receive a radio frequency (RF) signal of a first frequency band, and the first touch sensing circuit senses a touch input with respect to the conductive patch.