Twinax Cable Assembly for Multi-Rate Full-Duplex Transmission

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Solution Overview

Problem

Current systems require eight or more pairs of twinax cables to achieve high data rates of 10 Gbps, leading to increased wiring costs and complex designs, while also limiting the ability to support multi-rate transmissions effectively.

Innovation Solution

A cable assembly utilizing four or less twinax pairs configured for full-duplex communications, where each pair can operate at different transmission rates, enabling 100 Gbps or greater data transmission rates by integrating transceivers and processors to encode and decode signals across multiple twinax pairs simultaneously.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If eight or more pairs of twinax cables are used to achieve high data rates of 10 Gbps, then the data transmission rate is improved, but the wiring cost and design complexity increase

Engineering Contradiction:
Improvedata transmission rateVSAvoidwiring complexity
Core Design Contradiction:
SpeedVSDevice complexity

Solution Approach 1:

The patent divides the high-speed data transmission task across multiple twinax cable pairs, where each pair operates at a lower individual rate (e.g., 10 Gbps) but collectively they achieve higher aggregate rates (e.g., 40 Gbps or 100 Gbps). This segmentation allows using fewer, simpler cable pairs while maintaining high overall throughput.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The transceiver is designed to support multiple transmission rates (10 Gbps, 20 Gbps, 40 Gbps, 100 Gbps) across different numbers of twinax cable pairs. This multi-functionality allows the same hardware infrastructure to adapt to different performance requirements, reducing the need for specialized high-speed cable assemblies.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Quantity of substance

If eight or more pairs of twinax cables are used to achieve high data rates, then the bandwidth capacity is improved, but the wiring cost increases

Engineering Contradiction:
Improvebandwidth capacityVSAvoidwiring cost
Core Design Contradiction:
Quantity of substanceVSEase of manufacture

Solution Approach 1:

The total bandwidth requirement is segmented across multiple cable pairs operating in parallel. Instead of requiring a single high-capacity cable assembly with eight or more pairs, the system uses fewer pairs (e.g., 2-4 pairs) that are multiplexed through time-division or frequency-division techniques, reducing material costs and assembly complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts transmission parameters including data rate, modulation scheme, and number of active cable pairs based on channel conditions and performance requirements. This allows optimal bandwidth utilization with fewer physical cables, reducing manufacturing and deployment costs.

Inventive Principle:
Principle #35Parameter changes

3Use of energy by moving object

If baseband digital communication is used to achieve low latency and low power dissipation, then the power efficiency is improved, but the media analog bandwidth requirement increases

Engineering Contradiction:
Improvepower dissipationVSAvoidanalog bandwidth
Core Design Contradiction:
Use of energy by moving objectVSSpeed

Solution Approach 1:

The high-bandwidth baseband signal is segmented across multiple lower-bandwidth twinax cable pairs. Each pair carries a portion of the total data stream at a reduced individual bandwidth requirement, making the physical media more feasible while maintaining overall high throughput through parallel transmission.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system transitions from a single high-bandwidth channel to multiple parallel lower-bandwidth channels, effectively adding a spatial dimension to the transmission. This dimensional expansion allows baseband digital communication to achieve high aggregate bandwidth without requiring any single cable pair to support excessively high analog frequencies.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS9787519B2Multi-rate transmissions over twinax cables
Publication Date: 2017.10.10 MACOM CONNECTIVITY SOLUTIONS LLC
  • US9787519B2 patent drawing
  • US9787519B2 patent drawing
  • US9787519B2 patent drawing

AI summary

Cable systems and assemblies integrate a reduced number of twin axial cables to transmit and received in a full-duplex transmission signals at transmission speeds greater than or equal to one hundred Giga bytes per second. The reduced number of twin axial cables comprise four or less twin axial cables, in which each pair forms a single twin axial full-duplex cable for passive or active communication of the signals at multiple different transmission rates concurrently. A processor can be integrated with the twin axial cables and operate to encode the signals for fast transmission speeds at the different transmission rates.