USB Connector Ground Terminal Shielding Crosstalk
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Solution Overview
Problem
USB 3.0 connectors experience crosstalk interference due to the close arrangement of terminals, which affects signal quality and transmission efficiency.
Innovation Solution
The design of the USB receptacle and plug connectors includes a ground terminal with a widened connecting section that separates signal terminals, preventing crosstalk interference by positioning the ground terminal to cover the first pair of signal terminals, thereby stabilizing transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If USB 2.0 and USB 3.0 terminals are arranged closely together in the connector, then the connector size is reduced and compatibility is improved, but crosstalk interference occurs between signal terminals affecting transmission quality
Solution Approach 1:
A ground terminal is positioned between the USB 2.0 signal terminals (D+, D-) and USB 3.0 signal terminals (SSTX+, SSTX-, SSRX+, SSRX-) to act as an electromagnetic shield. This ground terminal serves as an intermediary that blocks signal interference between the two protocol terminals, resolving the crosstalk issue while maintaining the compact connector design.
2Device complexity
If signal terminals are positioned close together to reduce connector complexity, then device complexity is reduced, but signal integrity deteriorates due to crosstalk
Solution Approach 1:
The ground terminal acts as a mediator that provides electromagnetic shielding between signal terminals. By inserting this ground reference between adjacent signal carriers, the connector maintains structural simplicity while ensuring reliable signal transmission through reduced crosstalk.
3Adaptability or versatility
If USB 2.0 and USB 3.0 protocols are integrated in a single connector for compatibility, then adaptability is improved, but harmful electromagnetic interference between different protocol signals increases
Solution Approach 1:
Ground terminals are strategically positioned as intermediaries between USB 2.0 and USB 3.0 signal terminals. This configuration enables the connector to support both protocols simultaneously while the ground terminals mitigate electromagnetic interference generated by the integrated multi-protocol design.
Data Source
AI summary
The present device is a Universal Serial Bus (USB) connector which includes a first terminal set and a second terminal set. By increasing the width of a connection portion of a ground terminal of the second terminal set, and bending two pairs of the signal terminal within the second terminal set toward one side respectively and surrounding two sides of the ground terminal connecting section so as to let two pairs of the signal terminals away from the signal terminals in the first terminal set so as avoid the crosstalk interference caused by the first pair of the signals terminals in the second pair of the signal terminals and the third pair of the signal terminals to stabilize the transmission.