Mobile Terminal Side Antenna Design for Bezel Reduction
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Solution Overview
Problem
As mobile terminals increase in display size, the reduced bezel size interferes with antenna performance due to the proximity of flexible display substrates, leading to mutual interference and performance degradation in wireless communication.
Innovation Solution
A mobile terminal design featuring conductive members arranged on side surfaces with strategically placed slits and a ground line, allowing for the formation of slot-type antennas that minimize interference with the flexible display substrate, while maintaining a reduced bezel size by optimizing antenna placement and power supply through feed units and switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display size is increased, then the display area is improved, but the bezel size is reduced which causes interference with antenna performance
Solution Approach 1:
The side surface of the terminal is divided into multiple conductive members (first conductive member, second conductive member, third conductive member) with slits between them, creating segmented antenna structures that can be independently optimized for different frequency bands while maintaining compact bezel dimensions
Solution Approach 2:
The antenna structures are positioned on the side surfaces of the terminal rather than on the front or back surfaces, utilizing the lateral dimension to accommodate antenna elements without increasing the display area or bezel size, thereby resolving the conflict between large display and antenna performance
2Length of stationary object
If the distance between the side case and flexible display substrate is reduced, then the bezel size is reduced, but the wireless communication performance is degraded due to interference
Solution Approach 1:
The third conductive member positioned between the first and second conductive members acts as an intermediary element that helps isolate the antenna structures from the flexible display substrate, reducing electromagnetic interference while allowing the bezel to be minimized
Solution Approach 2:
Different regions of the side surface are assigned different conductive members with specific lengths and positions optimized for different frequency bands, allowing localized optimization of antenna performance in proximity to the flexible display substrate while maintaining overall compact 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 design secures antenna performance and reduces bezel size, enhancing wireless communication efficiency by minimizing interference from the flexible display substrate and adapting to frequency bands and user handling.
Implementation Method 1
the first conductive member and the base unit form a slot to form a first antenna transmitting and receiving a first signal, the second conductive member and the base unit form another slot to form a second antenna transmitting and receiving a second signal
Data Source
AI summary
A mobile terminal is provided that includes a metal frame including a base unit and a side unit, a main substrate located on a rear surface of the base unit, a display unit seated on a front surface of the base unit, and feed lines extending from the main substrate, connected to the side unit and supplying power to the side unit. The side unit includes a first conductive member including a first part and a second part, a second conductive member including a third part and a fourth part, a third conductive member located between the first and second conductive members, a first slit provided between the first and third conductive members and a second slit provided between the second and third conductive, and a length of the second part is two or more times a length of the first part.