LGA-Compatible Cable Assembly With Shielded Carrier Board
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Solution Overview
Problem
Existing electrical cable assemblies are not configured to mate with land grid array (LGA) sockets, which are commonly used in communication systems, due to differences in mounting directions and interface compatibility.
Innovation Solution
A cable assembly with a carrier board having a terminating side and a mounting side, where the contact array and mating array are interconnected through conductive pathways, allowing the cable assembly to be mounted onto an LGA socket with a two-dimensional array of electrical contacts, and including a shield assembly to reduce crosstalk and secure the cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional electrical cable assemblies with I/O pluggable modules are used, then the cable assembly can be connected to receptacle assemblies, but the cable assembly cannot be mounted onto LGA sockets due to incompatible mounting directions and interfaces
Solution Approach 1:
The cable assembly is designed with a carrier board that can serve multiple functions: it provides both a mating array of electrical contacts for engaging LGA sockets and a contact array for connecting to cables. This multi-functional design enables the same cable assembly structure to interface with different components (LGA sockets and cable connectors) using appropriate connection methods, thereby achieving universality and compatibility across different connection types without requiring separate specialized assemblies for each interface type.
2Use of energy by moving object
If direct electrical connection is used instead of optical conversion, then power consumption is reduced, but existing cable assemblies cannot mate with LGA sockets
Solution Approach 1:
The invention changes the physical and electrical parameters of the cable assembly to match LGA socket requirements. Specifically, it configures the mating array with electrical contacts arranged in a two-dimensional grid pattern that aligns with LGA socket pinouts, uses conductive pathways with appropriate trace widths and impedance controls, and structures the carrier board with mounting features that engage with LGA socket receptacles. These parameter changes enable direct electrical connection compatibility while maintaining low power consumption characteristics.
3Ease of manufacture
If cable end portions are exposed for termination, then cable connections can be made to the carrier board, but crosstalk between signal conductors increases
Solution Approach 1:
The shield assembly is designed to nest over the exposed cable end portions and contact array area, creating a nested protective structure. The shield assembly includes a first portion that extends over the cable end portions and a second portion that extends over the contact array, with conductive shielding material that is electrically connected to ground. This nested shielding configuration contains electromagnetic fields within the shielded region, preventing crosstalk between adjacent signal conductors while maintaining ease of cable termination through the open structure.
Data Source
AI summary
Cable assembly including a carrier board having a terminating side and a mounting side that face in opposite directions. The terminating side includes a contact array of electrical contacts. The mounting side includes a mating array of electrical contacts. The contact array and the mating array are interconnected to each other through conductive pathways of the carrier board. The contact array along the terminating side overlaps with the mating array along the mounting side. The carrier board is configured to be mounted onto an electrical component having a two-dimensional array. The cable assembly also includes a plurality of cables having cable end portions that are coupled to the carrier board. The cable assembly includes a shield assembly that extends over the terminating side and covers the cable end portions and the contact array.