Antenna Integrated Into Touch Sensor Metal Border
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Solution Overview
Problem
Mobile device manufacturers face challenges in ensuring clear RF transmission and reception due to metal components in touch screen displays and chassis, which cause interference and require unsightly cutouts, leading to signal loss and increased manufacturing costs.
Innovation Solution
Integrating a far-field antenna into the metalized border region of the touch sensor, formed by modifying the metalized border area to create a radiating structure that uses unused sections of the touch sensor's metalized border, allowing for improved RF signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metalized border areas are used in touch sensors, then electrical connections are achieved, but RF transmission and reception are interfered with
Solution Approach 1:
The metalized border area is segmented into two functional regions: a first metalized border region that maintains electrical connections for touch sensor operation, and a second metalized border region that forms the radiating structure for RF antenna operation. This segmentation allows each region to optimize its specific function while reducing mutual interference.
Solution Approach 2:
Different portions of the metalized border are assigned different properties and functions. The first border region is optimized for electrical connectivity with the touch sensor electrodes, while the second border region is configured with geometric characteristics suitable for RF radiation. This local differentiation resolves the conflict between electrical function and RF performance.
2Object-affected harmful factors
If cutouts are made in metalized borders to allow RF antenna radiation, then RF transmission is improved, but manufacturing complexity and cosmetic appearance deteriorate
Solution Approach 1:
The metalized border structure serves dual functions: it provides electrical connections for the touch sensor and simultaneously forms the radiating element for the RF antenna. By configuring the second metalized border region to have radiating characteristics, the same structural element performs both electrical and RF functions, eliminating the need for separate cutouts or antenna structures.
Solution Approach 2:
The touch sensor electrode structure and the RF antenna structure are merged into a single integrated metalized border configuration. The border region that would traditionally only serve electrical connection purposes is now also designed to function as the antenna radiating element, combining two previously separate functions into one unified structure.
3Object-affected harmful factors
If cutouts are made in metal chassis to allow RF antenna radiation, then RF transmission is improved, but cosmetic appearance deteriorates
Solution Approach 1:
The metalized border region serves multiple functions including structural support for the touch sensor, electrical connection pathway, and RF antenna radiating element. This multi-functionality eliminates the need for cosmetic cutouts in the chassis, as the RF radiation function is achieved through the existing border structure configuration rather than through openings in the external casing.
4Object-affected harmful factors
If metalized border areas are reduced to improve RF radiation, then RF transmission is improved, but electrical connection reliability deteriorates
Solution Approach 1:
The metalized border is divided into distinct functional zones where the first border region maintains sufficient metalized area for reliable electrical connections to touch sensor electrodes, while the second border region is configured to provide adequate radiating structure for RF antenna operation. This segmentation ensures that reducing metal for RF purposes does not compromise electrical connectivity.
Solution Approach 2:
Different sections of the metalized border are optimized for different requirements: areas requiring high electrical conductivity are maintained with continuous metalized structures, while areas serving as antenna radiators are configured with geometric patterns suitable for RF radiation. This localized optimization allows each region to fulfill its specific function effectively.
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 solution enhances antenna efficiency by 1-6 dB across various frequency bands, reduces interference, and provides a more aesthetically pleasing design by eliminating the need for cutouts, while maintaining a sleek cosmetic exterior.
Implementation Method 1
a far-field antenna which is operatively coupled with the radio frequency transmitter and the radio frequency receiver
Data Source
AI summary
A touch sensor with a transparent conductive layer and a metalized border area at least partially bordering the transparent conductive layer and forming a far-field antenna.