Rollable Housing Antenna Switching for Low-Band Interference Control
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Solution Overview
Problem
In rollable electronic devices with sliding housings, antennas in the first and second housings can experience interference due to their conductive nature, limiting their electrical length and radiation performance.
Innovation Solution
The electronic device incorporates a switching structure that adjusts antenna operation based on the device's state, ensuring sufficient electrical length for low-band operation and minimizing interference between sliding housings and conductive structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antennas are configured with conductive portions of the first housing and second housing in a rollable electronic device, then the antenna radiation performance can be improved, but interference occurs between the antennas due to the sliding mechanism
Solution Approach 1:
The patent divides the antenna system into separate segments: a first antenna in the first housing and a second antenna in the second housing. By segmenting the antenna configurations and positioning them in different housings, the patent reduces mutual interference while maintaining radiation performance in the rollable electronic device.
Solution Approach 2:
The patent utilizes the spatial dimension created by the sliding mechanism between first and second housings. By positioning antennas in different housings that move relative to each other along a sliding direction, the patent creates additional spatial separation to reduce interference while maintaining antenna functionality.
2Adaptability or versatility
If the electrical length of antennas is extended for low-band operation, then the antenna can operate in low frequency bands, but the sliding housing structure limits the available electrical length
Solution Approach 1:
The patent employs dynamic antenna configurations that adapt to the sliding state of the housings. The antenna structures are designed to change their effective electrical length based on the relative position of the first and second housings, enabling low-band operation when the device is in extended states while accommodating the compact form when retracted.
Solution Approach 2:
The patent implements nested antenna structures where antenna elements are positioned within the housing structures in a space-efficient manner. The first antenna is nested in the first housing and the second antenna in the second housing, allowing sufficient electrical length for low-band operation while maintaining a compact overall form factor when the device is retracted.
Data Source
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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.