Wireless Data Terminal Grounding for Radio Performance
Solution Overview
Problem
The radio performance of wireless data terminal devices with detachable USB connectors is compromised due to limited grounding connections, leading to inadequate energy return and increased disturbances, which are not adequately addressed by existing technologies.
Innovation Solution
Implementing a double grounding arrangement with non-adjacent grounding points on both the detachable USB connector and the main circuit board, enhancing the connection between the device's grounding plane and the computer's grounding plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a detachable USB connector is used to reduce device size, then the device size is reduced and structure is simplified, but the grounding connection becomes insufficient leading to poor radio performance
Solution Approach 1:
The grounding connection is segmented into multiple independent paths by providing at least two grounding connections between the detachable USB connector and main circuit board. These multiple grounding paths work in parallel to compensate for the limited space, ensuring sufficient grounding capacity while maintaining the compact detachable connector design.
Solution Approach 2:
The grounding connections are arranged at non-adjacent positions, utilizing spatial distribution in multiple dimensions rather than concentrating grounding points in one location. This dimensional distribution optimizes the grounding plane connection effectiveness within the limited device volume.
2Adaptability or versatility
If a single thin wire or FPC flexible board is used to connect USB connector, then the connector can be detachable, but the grounding circuit becomes narrow and cannot effectively connect grounding planes
Solution Approach 1:
The grounding circuit is segmented into multiple parallel paths by establishing at least two separate grounding connections between the USB connector and main circuit board. This segmentation increases the total effective grounding area without requiring a single large connecting component, thus maintaining connector detachability while improving grounding capacity.
Solution Approach 2:
Multiple grounding connections are merged to form a composite grounding system. The combined effect of multiple thin wires or FPC flexible boards provides sufficient total grounding area, equivalent to or exceeding that of a single large connector, while preserving the advantages of detachable design.
3Device complexity
If grounding points are placed adjacent to each other, then the connection is simple, but the grounding plane connection effectiveness is reduced
Solution Approach 1:
The grounding points are deliberately positioned at non-adjacent, asymmetric locations rather than symmetric adjacent positions. This asymmetric distribution optimizes the grounding plane connection by utilizing different spatial zones, improving the effectiveness of energy return and disturbance reduction while adding minimal complexity to the grounding arrangement.
Data Source
AI summary
A wireless data terminal device comprises a detachable USB connector and a main circuit board, where at least two redundancy grounding connections are provided between the detachable USB connector and the main circuit board, and the grounding points of the at least two redundancy grounding connections are not adjacent to each other. A method for improving the radio performance of the wireless data terminal device is further provided. With the wireless data terminal device or the method for improving the radio performance of the wireless data terminal device, the connection of the grounding plane of the wireless data terminal device with the grounding plane of a computer is effectively enhanced. Therefore, the radio performance of the wireless data terminal device is improved.