Rollable Antenna Slit Layout for Stable Radiation Spacing
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Solution Overview
Problem
In rollable electronic devices, the antenna's radiation performance is degraded due to the proximity of the antenna to the second conductive area when the second housing is slid into the first housing, making it difficult to maintain the required separation distance for optimal performance.
Innovation Solution
The introduction of a slit structure in the second conductive area of the second housing allows for an overlap with the antenna in the first housing when viewed in a specific direction, effectively securing a separation distance and maintaining the antenna's radiation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the second housing is slid into the first housing to reduce device size, then the compactness of the electronic device is improved, but the separation distance between the antenna and the second conductive area is reduced causing radiation performance degradation
Solution Approach 1:
The second conductive area is segmented by introducing a slit structure that divides it into separate regions. This segmentation allows the antenna in the first housing to maintain adequate separation from at least portions of the second conductive area, reducing electromagnetic interference while preserving the slidable compact design of the electronic device
Solution Approach 2:
The slit structure acts as an intermediary element between the antenna and the second conductive area. By creating discontinuities in the second conductive area, the slit structure mediates the electromagnetic interaction, allowing the housings to slide together for compactness while preventing direct electromagnetic coupling that would degrade antenna performance
Data Source
AI summary
According to various embodiments of the disclosure, an electronic device may include: a first housing, a second housing, a printed circuit board (PCB), and a wireless communication circuit, wherein the first housing may include a first surface and a second surface perpendicular to the first surface at a first edge, and a first conductive area, and the first conductive area may include a first portion of a first slit extending from a point on the first surface to the first edge, a third surface of the second housing may include a second conductive area, and the second conductive area may include a second slit, wherein, in a first state, at least a portion of the first portion of the first slit may overlap the second slit when viewed in a second direction perpendicular to the first surface of the first housing, and wherein the wireless communication circuit may be configured to transmit and/or receive a signal of a first frequency band based on an electrical path including the first portion.