Direct Mate Cable Assembly Signal Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional integrated circuit assemblies face challenges in meeting signal and power output requirements due to limited surface area for conductors on printed circuit boards, necessitating improved electrical performance and signal density.
Innovation Solution
A communication system with a cable assembly that includes a housing and cable modules with ground and signal contacts, where the ground shield is electrically connected to the cables, and signal contacts are terminated to corresponding circuit board contacts, allowing for both top and bottom connections to increase connection density and reduce the number of interfaces needed on the circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional integrated circuit assemblies use traditional surface mount technology with limited surface area, then manufacturing simplicity is maintained, but signal density and electrical performance deteriorate
Solution Approach 1:
The cable assembly extends connections in the Z-direction (vertical dimension) by using flexible cables that can be routed through three-dimensional space within the housing, rather than being constrained to the two-dimensional PCB surface. This allows multiple signal paths to occupy the same footprint area by utilizing vertical clearance and internal volume.
Solution Approach 2:
The cable assembly employs a nested structure where multiple cables are housed within a common housing, and signal contacts are terminated within the housing volume. This nesting allows high-density conductor arrangements in three-dimensional space while maintaining a compact external footprint on the PCB.
2Quantity of substance
If more conductors are added to increase signal density, then electrical performance improves, but device complexity increases
Solution Approach 1:
Multiple cable assemblies are combined within a single housing structure, sharing common mounting features, grounding systems, and housing elements. This merging approach allows high conductor density while reducing overall structural complexity compared to having separate assemblies for each cable.
Solution Approach 2:
The housing serves multiple functions: it provides mechanical support for the cables, establishes electrical grounding through integrated ground shields, provides environmental protection, and facilitates PCB mounting through integrated mounting features. This multi-functionality reduces the need for additional separate components.
3Quantity of substance
If signal paths are lengthened to accommodate more connections, then connection density increases, but signal transfer efficiency deteriorates
Solution Approach 1:
The cable assemblies are pre-terminated with contacts configured for specific PCB interface locations, allowing direct connection to multiple PCB contacts simultaneously. This preliminary configuration enables multiple connections to be established with minimal signal path length, as the cables are positioned and terminated in advance to optimize electrical performance.
Data Source
AI summary
A communication system includes a circuit board having circuit board signal and ground contacts on the upper surface. The communication system includes a cable assembly having a housing holding a cable module with cables. A ground shield and signal contacts are electrically connected to the cables. The ground shield includes ground beams with ground mating interfaces coupled to corresponding circuit board ground contacts. Each signal contact has a terminating pad terminated to the cable conductor and a signal beam with a signal mating interface coupled to the circuit board signal contact. The housing includes contact channels receiving the signal and ground beams with the mating interfaces exposed for interfacing with the circuit board.