Rollable Device Antenna Design with Metal Rims and Delay Lines
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Solution Overview
Problem
Rollable electronic devices face challenges in maintaining antenna performance and minimizing space constraints due to the limited space for antennas, especially when the display is expanded or reduced, leading to changes in antenna characteristics and interference issues.
Innovation Solution
The implementation of a multi-antenna system with metal rims and delay lines, where each antenna operates in specific communication bands, with a processor controlling signal transmission and switching to optimize resonance and isolation characteristics, and a transceiver circuit managing MIMO and dual connectivity operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are arranged in a rollable electronic device, then communication functionality is improved, but antenna characteristics change as the display is expanded or closed
Solution Approach 1:
The patent implements a dynamic antenna system where the antenna configuration is adjusted based on the display state. When the display is expanded or closed, the system dynamically reconfigures the antenna connections through switching circuits to maintain optimal antenna characteristics for communication in each state.
Solution Approach 2:
The patent changes electrical parameters of the antenna system by using different antenna elements or connection configurations depending on the display state. This involves adjusting impedance, resonance frequency, or active antenna elements to compensate for physical changes in the device structure.
2Volume of moving object
If antennas are provided in limited space on side surfaces, then device compactness is improved, but space for additional antennas is constrained
Solution Approach 1:
The patent merges multiple antenna functions into the limited side surface space by using metal rims that serve both structural and antenna functions. Multiple antenna elements are integrated into the same physical space, allowing compact arrangement while maintaining multiple communication functions.
Solution Approach 2:
The patent utilizes the metal rim structure as a three-dimensional antenna element, transforming the traditional two-dimensional antenna layout into a three-dimensional configuration that exploits the depth and curvature of the rim to accommodate multiple antenna elements in limited space.
Data Source
AI summary
An electronic device according to one embodiment may include a first antenna implemented as at least one of a plurality of metal rims and disposed on one side region and a lower region of the electronic device, a second antenna disposed on the lower region to be spaced apart from the first antenna, and a third antenna implemented as one of the plurality of metal rims and disposed on the one side region to be spaced apart from an end portion of the first antenna by a slit. The end portion of the first antenna and an end portion of the third antenna spaced apart from each other by the slit may be connected to each other by a delay line having a predetermined length.