Antenna Cavity Extension for Foldable Device Space Constraints
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Solution Overview
Problem
The increasing number of antennas in small mobile devices, combined with reduced available volume and the need for antennas to function in both 'fold' and 'open' states of foldable devices, poses challenges to achieving sufficient antenna performance and coverage.
Innovation Solution
The design of an antenna cavity with a perpendicular cavity extension that can be open or closed, allowing for increased usable antenna volume and improved performance by guiding electromagnetic fields, and enabling the use of space within folding mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display size is extended to cover the whole front face of the device, then the display area is increased, but the usable antenna volume is decreased
Solution Approach 1:
The patent extends the antenna cavity in a direction perpendicular to the display surface, utilizing the third dimension (depth/thickness) of the device to compensate for the reduced antenna volume caused by the large display area. This allows maintaining antenna performance while maximizing display coverage.
2Volume of stationary object
If the antenna cavity size is reduced to accommodate more components, then the device compactness is improved, but the antenna performance is degraded
Solution Approach 1:
The patent compensates for reduced cavity volume by extending the cavity structure perpendicular to the main device plane, utilizing the thickness dimension to maintain the required antenna performance while keeping the device compact in the planar dimensions.
Solution Approach 2:
The cavity extension is integrated within the existing device structure, nesting the extended antenna cavity within the overall device housing and component arrangement to achieve compactness while maintaining performance.
3Adaptability or versatility
If the device uses a foldable display mechanism, then the display flexibility is improved, but the antenna design freedom is limited due to the need to function in both folded and unfolded states
Solution Approach 1:
The patent divides the antenna system into multiple independent cavities (first antenna cavity and second antenna cavity) positioned on different sides of the folding mechanism, allowing each cavity to be optimized for specific states (folded or unfolded) while maintaining overall antenna functionality across all device states.
Solution Approach 2:
The patent employs antenna cavities with different configurations (open vs. closed extensions) that are selectively activated based on the device state, creating a dynamic antenna system that adapts to folded or unfolded conditions while maintaining performance.
4Reliability
If multiple antennas are added to increase data rate and coverage, then the communication performance is improved, but the available antenna volume is further reduced
Solution Approach 1:
The patent utilizes the perpendicular dimension to create multiple antenna cavities stacked or arranged along the thickness direction, allowing multiple antennas to coexist within a compact planar footprint while maintaining sufficient volume for each antenna to achieve required performance.
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 enhances antenna performance and volume in foldable devices, maintaining performance regardless of the device's state and reducing the size of the antenna cavity when needed, while avoiding coupling and interference.
Implementation Method 1
The cavity extension may be open at an end of the cavity extension. This solution enables using the cavity extension as a guiding mechanism for an electromagnetic field excited by an antenna feed of the device.
Data Source
AI summary
A foldable mobile device is provided. The device includes an antenna cavity substantially enclosed by at least four conductor walls, and a gap between two substantially perpendicular conductor walls at a first side of the antenna cavity. The device further includes a cavity extension extending at a direction substantially perpendicular to the first side of the cavity and aligned with the gap. Devices, methods, and a non-transitory computer-readable medium are disclosed.