Optical Pluggable Module Interposer Assembly Signal Path
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Solution Overview
Problem
Conventional communication systems face issues with multiple interfaces between conductors and host circuit boards, leading to increased costs and electrical performance problems such as reflections, noise, and attenuation, particularly at high data rates.
Innovation Solution
A communication system is designed with an interposer assembly coupled to the host circuit board, which electrically connects an optical pluggable module directly to the host circuit board, reducing the number of interfaces and incorporating a cage member for electrical shielding and interference containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple interfaces (conductors-circuit card, circuit card-contacts, contacts-host circuit board) are used in conventional communication systems, then electrical connection is established, but electrical performance deteriorates due to reflections, noise, and attenuation at high data rates
Solution Approach 1:
The patent merges multiple separate interfaces into a single integrated signal path. The circuit card is eliminated and its functions are integrated directly into the pluggable module, reducing the signal path from multiple interfaces (conductors-circuit card, circuit card-contacts, contacts-host circuit board) to a single direct interface (conductors-host circuit board), thereby improving electrical performance by minimizing reflections, noise, and attenuation
Solution Approach 2:
The patent extracts and removes the circuit card from the signal path. By taking out the circuit card and its associated interfaces, the design eliminates the sources of reflections, noise, and attenuation that occur at each interface boundary, resulting in a cleaner signal path with better electrical performance
2Reliability
If multiple interfaces and components (circuit card, electrical communication connector) are used, then electrical connection is established, but system cost increases
Solution Approach 1:
The patent combines multiple separate components (circuit card, electrical communication connector, contacts) into a single integrated pluggable module design. This merging reduces the total component count and assembly complexity, leading to lower manufacturing costs while maintaining reliable electrical connection through the simplified direct interface
3Ease of operation
If conventional receptacle assembly with electrical communication connector is used, then pluggable module is received and connected, but signal path becomes complex with multiple interfaces causing reflections and noise
Solution Approach 1:
The patent extracts the circuit card and electrical communication connector from the conventional receptacle assembly design. By removing these intermediate components, the signal path is simplified to a direct connection between the pluggable module conductors and the host circuit board, eliminating the sources of reflections and noise while maintaining ease of pluggable module connection
Data Source
AI summary
A communication system includes a host circuit board and an interposer assembly coupled to the host circuit board having an interposer substrate including an host circuit board contacts at a lower surface and module contacts at an upper surface. The communication system includes an optical pluggable module having a mating interface along a bottom of the optical pluggable module facing the interposer assembly. The optical pluggable module includes a module substrate and optical engines coupled to the module substrate with optical fiber cables extending from the optical engines to the cable end. The module substrate has module substrate contacts at a lower surface of the module substrate being electrically connected to corresponding module contacts of the interposer assembly at the upper surface of the interposer substrate.