Repeater Crosstalk Reduction via Coupling Paths
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Solution Overview
Problem
The increasing communication speed has led to a significant problem of inter-pair crosstalk at the connector portion of repeaters, particularly between pins 3 and 6, due to their arrangement, which affects signal transmission.
Innovation Solution
The introduction of coupling transmission paths in the signal transmission unit that electrically couple adjacent main transmission paths to intentionally generate and adjust crosstalk, using resistors to connect these paths and reduce inter-pair crosstalk between pins 3 and 6, as well as other pairs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If pins are arranged at narrow intervals in jack connectors, then the connector size is reduced and pin density is increased, but inter-pair crosstalk increases
Solution Approach 1:
The patent intentionally generates crosstalk signals through coupling transmission paths to counteract the harmful crosstalk caused by narrow pin spacing. By converting the harmful effect of crosstalk into a beneficial counter-signal, the system reduces overall inter-pair crosstalk while maintaining compact connector dimensions
Solution Approach 2:
Coupling transmission paths are introduced as intermediary elements between main transmission paths. These coupling paths generate controlled crosstalk signals that act as mediators to cancel out the harmful electromagnetic interference between adjacent pins
2Adaptability or versatility
If pins 3 and 6 are paired as differential signal lines, then standard TIA/EIA-568-B pinout is maintained, but crosstalk is generated especially between this pair and other pairs due to their arrangement
Solution Approach 1:
The patent maintains the standard TIA/EIA-568-B pinout configuration while intentionally generating crosstalk signals through coupling paths. These controlled crosstalk signals counteract the natural crosstalk produced by the physical arrangement of pins 3 and 6, allowing standard compatibility to be preserved without suffering from excessive interference
Solution Approach 2:
The coupling transmission paths pre-generate crosstalk signals that oppose and cancel the harmful crosstalk that would naturally occur between the standard pin pairs. This preliminary counter-action prevents the net crosstalk from exceeding acceptable levels while maintaining standard pinout configuration
Data Source
AI summary
A crosstalk reduction method includes providing a signal transmission unit including first to eighth main transmission paths, the first and second paths, the third and sixth paths, the fourth and fifth paths and the seventh and eighth paths being respectively paired to transmit differential signals, providing a first coupling transmission path in the signal transmission unit, the first coupling transmission path being adapted to electrically couple the third main transmission path to the fifth and seventh main transmission paths that are located adjacent to the sixth main path, and providing a second coupling transmission path in the signal transmission unit, the second coupling transmission path being adapted to electrically couple the sixth main transmission path to the second and fourth main transmission path that are located adjacent to the third main transmission path.