Foldable UWB Antenna Layout for Accurate Position Measurement
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Solution Overview
Problem
Foldable electronic devices face challenges in securing space for multiple UWB antennas, which affects positioning accuracy due to their distribution across different housings.
Innovation Solution
The electronic device is designed with a foldable housing that includes a hinge module and multiple housings, each with an antenna, allowing antennas to be spaced apart by a half wavelength in a folded state and an error range in an unfolded state, using phase differences and reception time differences for positioning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple UWB antennas are mounted in a single housing, then positioning accuracy is improved, but device complexity and space utilization are worsened
Solution Approach 1:
The patent divides the antenna system across multiple housings (first housing and second housing) of the foldable device. Each housing contains at least one UWB antenna, allowing the antenna array to be segmented spatially while maintaining positioning functionality. This segmentation resolves the contradiction by distributing antenna elements across separate structural units, reducing the complexity of arranging multiple antennas within a single housing while preserving measurement precision through multi-antenna signal processing.
2Volume of moving object
If antennas are distributed across different housings, then space utilization is improved, but positioning accuracy is worsened
Solution Approach 1:
The patent exploits the third dimension (folding state) to resolve the contradiction. In the folded state, antennas in different housings are positioned close together (first distance), while in the unfolded state, they are positioned farther apart (second distance). This dimensional transformation allows the system to utilize internal space efficiently in both states while maintaining positioning accuracy through dynamic distance adaptation, where the processor selects appropriate antenna pairs based on the current folding state.
3Device complexity
If antenna spacing is fixed, then device structure is simplified, but positioning accuracy varies with device state
Solution Approach 1:
The patent implements a dynamic antenna spacing system where the distance between antennas changes according to the device's folding state. The processor detects whether the device is folded or unfolded and dynamically selects appropriate antenna pairs for positioning operations. In the folded state, antennas are spaced at a first distance suitable for compact positioning, while in the unfolded state, they are spaced at a second distance for extended positioning. This dynamic adaptation maintains positioning accuracy across different device configurations without requiring complex mechanical adjustment mechanisms.
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 effectively utilizes internal space and maintains positioning accuracy even when antennas are distributed across different housings, regardless of the device's use mode.
Implementation Method 1
a first antenna disposed in the first housing and capable of transmitting and receiving a signal based on a first frequency band, a second antenna disposed in the second housing and capable of transmitting and receiving a signal based on the first frequency band
Data Source
AI summary
An electronic device is provided that includes a foldable housing. The foldable housing includes a hinge module, a first housing, and a second housing. The first housing is connected to the hinge module and includes a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a first antenna supporting a first frequency band. The second housing is connected to the hinge module and includes a third surface facing a third direction, a fourth surface facing a fourth direction opposite to the third direction, and a second antenna supporting the first frequency band, and is folded with the first housing with respect to the hinge module. In the electronic device, in a folded state in which the first surface faces the third surface, the first antenna and the second antenna may be arranged to be spaced apart from each other by half a wavelength corresponding to the first frequency band, and in an unfolded state in which the first direction and the third direction are the same direction, the first antenna and the second antenna may be arranged to be spaced apart from each other by an error range or more, wherein the error range corresponds to the first frequency band.