Retractable Antenna Assembly for Adjustable Isolation in Data Terminals
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Solution Overview
Problem
Conventional wireless data terminals have fixed antenna spacing, limiting their applicability to a single application scenario and failing to adjust antenna isolation according to varying requirements, which restricts their performance in different usage scenarios.
Innovation Solution
A wireless data terminal with adjustable antenna assemblies that can extend or retract, allowing for variable spacing to meet specific isolation needs, achieved through a drive assembly and strategic placement of antennas with different operating frequency bands to maximize isolation and minimize size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the antenna spacing is fixed, then the device structure is simple, but the adaptability to different application scenarios is poor
Solution Approach 1:
The patent implements a movable antenna assembly that can dynamically adjust its position relative to the housing. The antenna assembly is configured to move between a first position (retracted) and a second position (extended), enabling dynamic adaptation to different application scenarios. This dynamic structure resolves the contradiction by allowing the device to change its antenna spacing based on whether high isolation or compact form factor is prioritized.
Solution Approach 2:
The antenna assembly serves multiple functions: it provides both a compact form factor when retracted and high isolation when extended. The drive assembly enables the antenna to switch between these states, making the device universal enough to handle both scenarios where compact size is needed and scenarios where antenna isolation is critical.
2Reliability
If the antenna spacing is increased, then the antenna isolation is improved, but the device volume increases
Solution Approach 1:
The antenna assembly is designed to be movable rather than fixed, allowing it to extend to increase isolation when needed and retract to minimize volume when isolation requirements are lower. This dynamic positioning capability enables the device to achieve high antenna isolation (when extended) without permanently increasing its volume.
Solution Approach 2:
The antenna system is segmented into a movable antenna assembly and a fixed housing. This segmentation allows the antenna portion to be independently positioned, enabling it to extend for improved isolation or retract for compact storage, thus resolving the conflict between isolation and volume.
3Volume of moving object
If the antenna spacing is decreased, then the device volume is reduced, but the antenna isolation deteriorates
Solution Approach 1:
The movable antenna assembly can retract to reduce device volume while maintaining acceptable isolation for compact scenarios. When high isolation is required, the antenna extends to increase spacing. This dynamic adjustment allows the device to temporarily accept reduced isolation in exchange for compact form factor when needed.
Data Source
AI summary
This application provides a wireless data terminal and a wireless data terminal control system. The wireless data terminal includes a housing, a drive assembly, a first antenna assembly, and a second antenna assembly. The drive assembly can drive the first antenna assembly and the second antenna assembly to extend or retract to move in different directions between a first location and a second location. When the wireless data terminal does not need to be used or high isolation between antennas is not required, the drive assembly may drive the antenna assembly to retract to the first location, so that a volume occupied by the wireless data terminal can be reduced while an antenna isolation requirement is met. When high isolation between the antennas is required, the drive assembly may drive the antenna assembly to extend to the second location, so that isolation between the antennas is increased.