Foldable Antenna Wiring Structure for Low-Loss RF Hinges
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In foldable electronic devices with large screens, the increased distance between communication modules and antennas can lead to significant RF signal loss due to the large IF loss value of PCB wiring, compromising communication signal integrity.
Innovation Solution
The electronic device incorporates a specific wiring structure and hinge structure, utilizing a coaxial cable and connection members with varying physical properties in different hinge units to minimize RF signal loss between the communication circuit and antennas, ensuring signal integrity across multiple folds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the device size is increased to implement a large screen, then the display area is improved, but the wiring distance between communication module and antenna increases causing RF signal loss
Solution Approach 1:
The device body is divided into multiple foldable sections (first housing, second housing, third housing) connected by hinge units, allowing the display area to be expanded through spatial folding rather than simply increasing linear dimensions. This segmentation enables the antenna to be positioned in the third housing while keeping the communication module in the first housing, maintaining reasonable wiring distance despite large display area.
Solution Approach 2:
The patent transitions from a planar display arrangement to a three-dimensional foldable structure. By utilizing the folding dimension, the device achieves a large display area when unfolded while maintaining compact wiring paths through the hinge connections, effectively resolving the contradiction between display size and signal integrity.
2Device complexity
If PCB wiring is used to connect communication module and antenna across folded sections, then the device structure is simplified, but the IF loss value increases causing communication signal integrity to deteriorate
Solution Approach 1:
Connection members are introduced as intermediary components between the communication module in the first housing and the antenna in the third housing. These connection members traverse through the hinge units and are specifically designed to maintain electrical connectivity while accommodating the mechanical folding motion, thereby preserving signal integrity without requiring complex rigid wiring structures.
Solution Approach 2:
The patent changes the physical parameters of the connection members to suit the folding environment. The connection members are designed with specific flexibility, length, and routing characteristics that allow them to maintain low IF loss values despite the dynamic folding motion, transitioning from static PCB wiring to dynamic adaptable connections.
Data Source
AI summary
According to various embodiments of the present disclosure, provided is an electronic device comprising: a flexible display; a first housing; a first hinge unit which is connected to the side surface of the first housing, and which can be folded in a first rotation direction and unfolded in a second rotation direction; a second housing connected to the first hinge unit; a second hinge unit which is connected to a side surface of the second housing, and which can be folded in the second rotation direction and unfolded in the first rotation direction; a third housing connected to the second hinge unit; a circuit board which is positioned inside the first housing and which includes a communication circuit; at least one antenna positioned inside the third housing; and a connection member for electrically connecting the circuit board and the antenna module. The electronic device can vary according to embodiments.