Rollable Housing Antenna Layout for Low-Band Interference Control
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Solution Overview
Problem
In rollable electronic devices with sliding housings, interference occurs between antennas configured with conductive portions of the housings, affecting their electrical length and radiation performance, especially in low-frequency bands.
Innovation Solution
The electronic device incorporates a first housing with a plurality of conductive portions, including a U-shaped or C-shaped first and second antenna, which are electrically separated and spaced apart to avoid interference, ensuring sufficient electrical length for low-band operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If antennas are configured with conductive portions of the first housing and second housing in a rollable electronic device, then the antenna structure is integrated into the housing, but interference occurs between the antennas due to the sliding manner of the housings
Solution Approach 1:
The conductive portions of the housing are divided into multiple electrically separated segments. The first housing includes first and second conductive portions that are electrically separated from each other, and the second housing includes third and fourth conductive portions that are electrically separated. This segmentation prevents interference between adjacent antennas while maintaining integration with the housing structure.
Solution Approach 2:
Different conductive portions are positioned at specific locations on the housing surfaces to create localized antenna elements. The first and second conductive portions are disposed on at least a portion of a side surface of the first housing, while the third and fourth conductive portions are disposed on at least a portion of a side surface of the second housing, ensuring proper spatial distribution for independent antenna operation.
2Volume of moving object
If the conductive portions are placed close to the housing to maintain compact structure, then the device size is reduced, but the electrical length of the antennas is insufficient for low-band operation
Solution Approach 1:
The conductive portions are configured in U-shape or C-shape patterns that extend along the housing surfaces, utilizing the two-dimensional surface area to achieve sufficient electrical length. This allows the antennas to maintain compact footprint while achieving the required electrical length for low-band operation through optimized geometric patterns.
Data Source
AI summary
According to certain embodiments, an electronic device comprises: a first housing including a plurality of conductive portions electrically separated from each other and disposed on at least a portion of a side surface of the first housing; a second housing slidably coupled to the first housing; a flexible display supported by the first housing and the second housing and having a display area that is changable by sliding the second housing; and a wireless communication circuit disposed in the first housing and configured to transmit and receive wireless signals in a plurality of frequency bands via the plurality of conductive portions, wherein the plurality of conductive portions includes a first conductive portion and a second conductive portion, wherein the first conductive portion and the second conductive portion have a U shape or C shape and are electrically separated from each other, and wherein the first conductive portion is spaced apart from the first housing.