Female Connector Pin Inversion for Crosstalk Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional RJ 45 connectors experience high crosstalk noise due to parallel pin arrangements, especially at higher bandwidths above 250 MHz, and existing solutions to mitigate this noise are either ineffective or have complex, costly structures.
Innovation Solution
A female electrical connector design with 8 gold pins where the 1st, 3rd, and 5th pins have their transmission direction reversed relative to the 2nd, 4th, 6th, and 8th pins, with arched middle parts protruding over the latter, reducing parallelism and crosstalk interference, and a metal shielding shell for protection, facilitating simple fabrication and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pins are arranged in parallel for signal transmission, then the connector structure is simple and easy to manufacture, but crosstalk noise increases significantly
Solution Approach 1:
The patent applies inversion by reversing the transmission direction of specific pins (1st, 3rd, and 5th pins) relative to other pins. Instead of all pins transmitting in the same direction, these selected pins have their signal flow reversed, which disrupts the parallel arrangement and reduces crosstalk noise while maintaining manufacturing simplicity
Solution Approach 2:
The patent applies local quality by making different pins have different transmission directions based on their specific positions and functions. The 1st, 3rd, and 5th pins have reversed transmission direction while other pins maintain the original direction, creating localized variations in signal flow to minimize crosstalk between specific pin pairs
2Object-generated harmful factors
If pins of different pairs are isolated to reduce crosstalk, then crosstalk noise is reduced, but the connector structure becomes complicated and costly
Solution Approach 1:
Instead of physically isolating pins through complex structural modifications, the patent uses inversion of transmission direction as a simpler alternative. By reversing the signal flow direction of specific pins, the patent achieves crosstalk reduction without adding physical barriers or complex isolation structures
Solution Approach 2:
The patent changes the transmission direction parameter of specific pins rather than modifying the physical structure. This parameter change approach allows crosstalk reduction while maintaining the original simple connector structure, avoiding the need for complex isolation mechanisms
3Ease of manufacture
If conventional pin arrangement is used, then manufacturing is simple, but signal transmission quality degrades above 250 MHz bandwidth
Solution Approach 1:
The patent maintains manufacturing simplicity while improving high-frequency signal transmission by inverting the transmission direction of specific pins. This inversion reduces crosstalk noise that becomes problematic above 250 MHz, thereby improving signal transmission quality without complicating the manufacturing process
Solution Approach 2:
The patent introduces asymmetry in the pin arrangement by having different transmission directions for different pins. The 1st, 3rd, and 5th pins have reversed transmission direction compared to other pins, creating an asymmetric signal flow pattern that reduces crosstalk and improves signal integrity at higher frequencies
Data Source
AI summary
A female electrical connector includes an insulative housing, a rack mounted in the insulative housing and 8 pcs of gold pins arranged in the rack for signal transmission. The 1st, 3rd and 5th pins each have the respective top end extending obliquely backwardly from the front side of the rack and then curved and closely attached to the rear side of the rack so that the transmission direction of the 1st, 3rd and 5th pins is reversed to that of the 2nd, 4th, 6th, 7th and 8th pins, enabling the female electrical connector for signal transmission in the fully bandwidth range of 1˜500 MHz.