Rollable Housing Antenna Layout With Grounded Conductive Wall
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Solution Overview
Problem
In rollable electronic devices, the change from slide-in to slide-out states causes deviations in antenna operating frequency bands, leading to reduced radiation performance due to the proximity or separation of conductive parts between housings.
Innovation Solution
A conductive wall is positioned between the conductive parts of the first and second housings, electrically connected to ground, ensuring consistent radiation performance across slide-in and slide-out states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conductive part of the first housing is allowed to move relative to the conductive structure of the second housing during slide-in/slide-out operation, then the display area can be transformed, but the antenna operating frequency band deviates and radiation performance reduces
Solution Approach 1:
A conductive wall is introduced as an intermediary element between the conductive part of the first housing and the conductive structure of the second housing. This conductive wall acts as a mediator that maintains proper electromagnetic coupling relationships during slide-in and slide-out operations, preventing frequency deviation while allowing the display area to transform. The conductive wall is electrically connected to ground and positioned to overlap with the conductive part, creating a stable reference plane that isolates the antenna system from the moving conductive structures.
2Area of stationary object
If the conductive part is positioned close to the conductive structure in slide-in state, then the device is compact, but the antenna frequency band deviates due to electromagnetic interference
Solution Approach 1:
The conductive wall serves as a shielding intermediary that is positioned between the conductive part and the conductive structure when they are in close proximity during the slide-in state. This intermediary element prevents direct electromagnetic coupling between the two conductive elements, thereby maintaining antenna frequency stability while allowing the device to maintain its compact form factor.
Solution Approach 2:
The conductive wall, which might seem like an additional component increasing complexity, actually converts the potential harmful electromagnetic interference into a beneficial shielding effect. By strategically positioning the conductive wall to overlap with the conductive part, the design transforms the close proximity of conductive elements from a source of interference into an opportunity for effective electromagnetic shielding, maintaining both compactness and frequency stability.
3Ease of operation
If the conductive part is spaced apart from the conductive structure in slide-out state, then the antenna frequency band deviates due to changed electromagnetic environment
Solution Approach 1:
The conductive wall continues to function as an intermediary element during the slide-out state, maintaining its positioning relationship with the conductive part. Even as the conductive structure moves away, the conductive wall ensures that the electromagnetic environment around the conductive part remains stable, preventing frequency band deviation and maintaining reliable antenna operation throughout the slide-out operation.
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
The conductive wall maintains antenna performance by stabilizing the frequency band, enhancing reliability and consistency in wireless communication.
Implementation Method 1
a conductive wall fixed to at least a portion of the first housing and disposed to be electrically connected to a ground between the first side member and the second side member
Data Source
AI summary
An electronic device is provided. The electronic device includes a first housing including a first space and a conductive portion formed through at least a portion of a first side member, a second housing slidably coupled to the first housing in a first direction, at least partially overlapped with the first side member in a slide-in state, and including a second side member including a second space, a flexible display disposed to receive support from the first housing and the second housing and in which a display area at least partially varies when the electronic device is changed from the slide-in state to a slide-out state, a wireless communication circuit disposed in the first space and configured to transmit or receive a wireless signal in at least one frequency band through the conductive part, and a conductive wall fixed to at least a portion of the first housing and disposed to be electrically connected to a ground between the first side member and the second side member, wherein the conductive wall may be disposed to overlap the conductive portion when the first side member is viewed from the outside.