Foldable Display Antenna Layout for Dynamic MIMO Activation
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Solution Overview
Problem
The compact form factor of portable wireless devices limits the size, number, and placement of antenna elements, making it challenging to accommodate additional antennas required for advanced wireless transmission and reception techniques like MIMO and beamforming.
Innovation Solution
A foldable housing design that dynamically activates additional antennas when in the unfolded configuration and deactivates them when folded, using a shorting connection between antennas and a ground plane, allowing for a more complex antenna configuration in the unfolded state while maintaining a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional antenna elements are added to support MIMO and beamforming, then wireless transmission and reception performance is improved, but device size and complexity increase
Solution Approach 1:
The patent implements dynamic antenna configuration where the number and arrangement of antenna elements change based on device state. When the display is extended, additional antenna elements are activated to support MIMO and beamforming. When the display is folded, fewer antenna elements remain active. This dynamic adaptation allows the system to optimize wireless performance for each configuration without permanently increasing device complexity.
Solution Approach 2:
The patent changes physical parameters of the antenna system based on display configuration. The effective aperture, number of radiating elements, and antenna spacing are adjusted according to whether the display is extended or folded. This parameter adaptation enables the system to achieve high-performance MIMO operation when needed while maintaining a compact form factor when portability is prioritized.
2Reliability
If antenna elements are placed in the extended display area, then wireless performance is improved, but antenna placement becomes more difficult when the display is folded
Solution Approach 1:
The patent employs dynamic antenna activation where antenna elements positioned in the extended display area are selectively activated or deactivated based on display configuration. When the display is extended, antenna elements in the previously inaccessible area become accessible and are activated. When folded, these same elements are deactivated, simplifying the effective antenna placement problem to a manageable configuration.
3Volume of moving object
If the device maintains a compact form factor, then portability is improved, but the number and placement options for antenna elements are limited
Solution Approach 1:
The patent utilizes the temporal dimension and configuration state as an additional degree of freedom. By allowing the device to transition between folded and extended states, the system effectively increases the available space for antenna elements without permanently increasing the compact form factor. The extended display area provides additional dimensional space for antenna placement that is accessible only when needed.
Solution Approach 2:
The patent changes the effective volume and available space parameters based on display configuration. When extended, the device occupies more space providing greater freedom for antenna element placement and higher quantities of antenna elements. When folded, the device returns to its compact form with fewer active antenna elements, optimizing the trade-off between portability and wireless capability.
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 enables improved wireless performance by supporting more active antenna elements in the unfolded configuration, enhancing data throughput and reliability through MIMO and diversity antenna operations, while maintaining portability in the folded state.
Implementation Method 1
a ground plane slot structure positioned between the first ground plane region and the second ground plane region electrically isolating the first antenna from the second antenna
Implementation Method 2
a shorting connection between the second antenna and a ground plane is formed when the housing is transitioned from the unfolded configuration to the folded configuration
Data Source
AI summary
An electronic device includes a housing having a first panel connected to a second panel movable between folded and unfolded configurations. A first antenna is located adjacent to the first panel and a second antenna is located adjacent to the second panel. The second antenna is activated when the housing is in an unfolded configuration and is deactivated when the housing is in a folded configuration.