Foldable Antenna Housing Layout for RSE Control
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Solution Overview
Problem
Foldable electronic devices experience radiated spurious emission (RSE) issues due to overlapping antennas when in a folded state, leading to degraded antenna performance and ineffective frequency amplification.
Innovation Solution
The electronic device incorporates a foldable structure with antennas formed using metallic and nonmetallic materials, where the processor controls the on/off state of a low noise amplifier based on the device's state and wireless communication method to prevent interference between overlapping antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antennas are disposed in separated housing structures that are folded together, then the device achieves a compact foldable form factor, but the overlapping antennas interfere with each other causing radiated spurious emission
Solution Approach 1:
A nonmetallic material segment is introduced as an intermediary element between the two metallic antenna structures. This segment acts as a mediator that prevents direct electromagnetic interference between the overlapping antennas while allowing the device to maintain its compact foldable form. The nonmetallic material serves as a physical and electromagnetic barrier that isolates the antennas from each other during the folded state.
Solution Approach 2:
The housing structure is segmented into distinct metallic and nonmetallic portions. The first housing structure contains a metallic segment forming the first antenna and a nonmetallic segment for isolation. The second housing structure similarly contains a metallic segment forming the second antenna. This segmentation allows the antennas to be physically separated by material type even when spatially overlapping.
2Measurement precision
If the low noise amplifier is always on to ensure signal reception, then reception sensitivity is maintained, but noise interference increases when antennas overlap in folded state
Solution Approach 1:
The low noise amplifier's operational state is made dynamic rather than static. The processor controls the LNA to switch between on and off states based on real-time detection of device state (folded or unfolded) and current operational requirements. This dynamic control allows the system to optimize reception sensitivity when needed while preventing noise interference when the device is folded and antennas are overlapping.
Solution Approach 2:
The system implements feedback control where the processor continuously monitors the device's folded state and adjusts the low noise amplifier's operation accordingly. When the device is detected to be in a folded state with overlapping antennas, the processor provides feedback to turn off the LNA to prevent noise interference. When unfolded or when transmission is active, the LNA is turned on to maintain reception sensitivity.
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a first housing structure and a second housing structure, at least a portion of the first housing structure is formed with a metallic material to form at least one first antenna, and at least another portion of the first housing structure is formed with a nonmetallic material to isolate the at least one first antenna, and at least a portion of the second housing structure is formed with a metallic material to form at least one second antenna, and at least another portion of the second housing structure is formed with a nonmetallic material to isolate the at least one second antenna.