Multi-Radiator Antenna Layout for Curved-Screen Clearance Limits
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Solution Overview
Problem
The radiation efficiency of antennas in electronic devices with curved screens is compromised due to reduced clearance environments and deteriorating radiation capabilities as the frame size becomes smaller in the thickness direction, leading to lower communication performance.
Innovation Solution
The implementation of a reference ground layer and a second radiator, where the second radiator is electrically connected to the reference ground layer, generating a ½ wavelength characteristic mode to enhance radiation efficiency by coupling with the first radiator, and utilizing lumped parameter elements to adjust the parasitic resonant band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the frame size is reduced in the thickness direction to accommodate curved screens, then the screen curvature can be increased, but the clearance environment of the antenna deteriorates and radiation capability becomes worse
Solution Approach 1:
The antenna system is segmented into multiple radiators (first radiator, second radiator, third radiator) with different resonant frequencies. Each radiator is positioned at different locations relative to the reference ground layer, allowing them to operate independently at different frequency bands without interfering with each other, thus maintaining radiation efficiency in reduced clearance environments
Solution Approach 2:
The patent utilizes the third dimension (thickness direction) by positioning radiators at different heights above the reference ground layer. The first radiator is positioned at a first distance, the second radiator at a second distance, and the third radiator at a third distance, creating a multi-layer antenna structure that improves radiation performance despite reduced overall frame thickness
2Adaptability or versatility
If multiple radiators are added to improve radiation efficiency, then the frequency coverage can be expanded, but the device complexity increases
Solution Approach 1:
Multiple radiators with different resonant frequencies are merged into a single antenna system that shares a common reference ground layer. The first radiator, second radiator, and third radiator are all electrically connected to the same reference ground layer, creating an integrated multi-band antenna that provides wide frequency coverage while maintaining a relatively simple overall structure
Solution Approach 2:
The reference ground layer serves multiple functions: it provides the reference potential for all radiators, enables resonant coupling for each radiator at its specific frequency band, and acts as a common grounding structure. This universal component allows the antenna system to handle multiple frequency bands without requiring separate grounding structures for each radiator
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 improves antenna radiation efficiency and expands the application bands, allowing for wider frequency coverage and reduced physical occupation on the frame.
Implementation Method 1
The second radiator and the first radiator are disposed at an interval, and the second radiator is electrically connected to the first edge of the reference ground layer... a parasitic resonant band generated by the second radiator when a radio frequency signal is fed at the first feed point
Implementation Method 2
The reference ground layer can be excited within a main resonant band of the first radiator to generate a 1/2 wavelength characteristic mode in a first direction... an electrical length of the reference ground layer in the first direction is a 1/2 wavelength of the main resonant band of the first radiator
Data Source
AI summary
An electronic device includes a reference ground layer, a first radiator, and a second radiator, where the reference ground layer has a first edge, and a second edge and a third edge respectively connected to two ends of the first edge. The first radiator has a first ground point and a first feed point that are disposed at an interval. The second radiator is electrically connected to the first edge of the reference ground layer, or an end section that is of the second edge and that is connected to the first edge, or an end section that is of the third edge and that is connected to the first edge. When a radio frequency signal is fed at the first feed point, a parasitic resonant band generated by the second radiator is lower than the main resonant band generated by the first radiator.