QSFP Receptacle Connector Wire Interconnect for High-Speed Signal Transmission
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Solution Overview
Problem
Traditional receptacle connectors on printed circuit boards face limitations in high-speed, high-frequency signal transmission due to the inherent constraints of conductive traces, necessitating an alternative method for connecting QSFP or other type modules without relying on traces.
Innovation Solution
An electrical receptacle connector is mounted within a metallic cage, with contacts arranged to connect both to a printed circuit board and wires, which in turn connect to another connector on an adjacent CPU socket board, enabling high-speed signal transmission through wires instead of traces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conductive traces on printed circuit board are used for signal transmission, then the connection between receptacle connector and CPU is established, but the signal transmission speed and quality deteriorate at high frequencies
Solution Approach 1:
The patent introduces wires as an intermediary medium to replace the traditional PCB trace path. The wires serve as a mediator between the receptacle connector and the CPU socket, enabling high-speed signal transmission by bypassing the lossy trace structure. This is achieved by mounting the receptacle connector on the PCB, connecting it to wires that extend to another connector near the CPU socket, thereby creating a hybrid trace-wire transmission path that overcomes the bandwidth limitations of pure trace-based connections.
2Productivity
If traditional trace-based connection is used, then the structure is simple, but the high-speed signal transmission capability is limited
Solution Approach 1:
The patent segments the signal transmission path into two distinct parts: the PCB trace portion that handles routing and connection, and the wire portion that handles high-speed signal transmission. This segmentation allows each component to be optimized for its specific function - the PCB provides structural support and electrical connection, while the wires provide low-loss high-frequency transmission. The receptacle connector serves as the interface point where the trace path transitions to the wire path.
Solution Approach 2:
The receptacle connector serves multiple functions in this hybrid architecture: it provides the electrical interface for the QSFP module, connects to both PCB traces and wires, and acts as a transition point between different transmission media. This multi-functionality allows the system to maintain simplicity at the module interface while achieving high-speed performance through the wire connection to the CPU socket.
Data Source
AI summary
An electrical receptacle connector is mounted within a metallic cage for mating with a QSFP module received within the cage. The contacts of the cable receptacle connector are arranged with two groups, of which one are connected to the printed circuit board on which the cage is mounted, and the other are connected to the wires which are further connected to a board-mount receptacle connector mounted on another printed circuit board on which the CPU (Central Processing Unit) socket is mounted. Each board-mount receptacle connector corresponds to more than one cable receptacle connector.