Antenna Isolation in Electronic Devices with Full Front Display
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Solution Overview
Problem
As electronic devices with expanded display panels reduce available space, the proximity of conductive display panels to antennas degrades antenna performance, causing interference with signal transmission and reception.
Innovation Solution
The antenna radiator is spaced apart from the display panel layer-wise, with a non-conductive member surrounding the display panel to prevent performance degradation, and the antenna is designed with a metallic sheet and support member to suppress electromagnetic noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display panel is expanded to occupy most of the front surface, then the display area is increased, but the antenna performance is degraded due to proximity interference
Solution Approach 1:
The patent transitions from planar antenna placement to three-dimensional layer-wise stacking, positioning the antenna in a different spatial layer (z-direction) above or below the display panel. This dimensional separation allows the display to occupy maximum front surface area while the antenna operates in an adjacent layer, eliminating proximity interference and maintaining antenna performance.
Solution Approach 2:
The patent implements a nested structure where the antenna is integrated within the multi-layer housing structure, with the display panel and antenna occupying different layers of the same device envelope. The antenna is positioned in an inner layer while the display occupies the outer front surface, creating a nested arrangement that maximizes space utilization without interference.
2Volume of moving object
If the display panel is placed adjacent to the antenna to maximize space utilization, then the device compactness is improved, but signal transmission and reception are compromised
Solution Approach 1:
The patent resolves the conflict between compactness and signal interference by moving the antenna to a different spatial dimension (layer), rather than increasing lateral separation. The antenna is positioned in the z-direction above or below the display panel, maintaining device compactness in the x-y plane while eliminating harmful electromagnetic interference through vertical layering.
Solution Approach 2:
The patent introduces dielectric members and housing layers as intermediary structures between the display panel and antenna. These intermediate layers act as electromagnetic shields and isolators, preventing direct interference between the conductive display panel and the antenna while maintaining compact integration within the device housing.
3Length of stationary object
If the antenna is positioned close to the display panel, then the device thickness is reduced, but the conductor in the display panel interferes with antenna operation
Solution Approach 1:
The patent maintains minimal device thickness by positioning the antenna in a different layer rather than increasing lateral distance. The antenna and display panel are stacked in the z-direction with small separation, achieving thin profile while the layer-wise arrangement prevents electromagnetic interference that would occur with planar proximity.
Solution Approach 2:
The patent employs composite housing structures with dielectric and conductive materials strategically positioned between the display panel and antenna. These composite layers provide electromagnetic shielding and isolation, preventing interference while maintaining the thin overall device thickness through optimized material stacking.
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 maintains antenna performance by isolating it from the display panel, ensuring effective wireless communication even with a full front display occupation.
Implementation Method 1
the proximity of conductive display panels to antennas degrades antenna performance, causing interference with signal transmission and reception
Implementation Method 2
antennas for transceiving wireless signals
Implementation Method 3
the antenna is designed with a metallic sheet and support member to suppress electromagnetic noise
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
Disclosed is an electronic device including a housing having a first surface, a second surface and a side surface; a touch screen display including a conductive plane substantially parallel with the first surface; a printed circuit board positioned between the touch screen display and the second surface substantially parallel with the conductive plane; a wireless communication circuit; and a side member forming at least a portion of the side surface, which includes a first elongated part surrounding at least a portion of the conductive plane and formed of a non-conductive material, and a second elongated part surrounding at least a portion of the printed circuit board, but no portion of the conductive plane, and extending in parallel with the first elongated part. The second elongated part is formed of a conductive material, and is electrically coupled to the wireless communication circuit.