EMI Shield for Optical Connector Using Segmented Housing
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Solution Overview
Problem
Existing optical connectors lack comprehensive protection from electromagnetic interference (EMI) and crosstalk between input and output lines, as current designs with single front shields are insufficient in preventing EMI and allowing crosstalk.
Innovation Solution
A duplex optical fiber connector with a socket housing featuring a canopy, rear housing, and independent front and rear shields, including sub-housing shields that completely surround the optical transceiver to isolate and protect the components from EMI, while maintaining light confinement and reducing electrical crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single front shield is used in the optical connector, then the device structure is simple, but EMI protection is insufficient and crosstalk between lines occurs
Solution Approach 1:
The shield structure is divided into multiple independent shields (first shield for receiver, second shield for transmitter, third shield at rear opening) instead of using a single shield. Each shield independently protects specific components, eliminating crosstalk between lines while providing comprehensive EMI protection.
Solution Approach 2:
The shields are nested within the housing structure, with each shield positioned to enclose specific components. The first and second shields are positioned at the front opening, while the third shield is at the rear opening, creating a nested protective arrangement that maximizes shielding effectiveness.
2Object-affected harmful factors
If multiple independent shields are added to protect against EMI and crosstalk, then EMI protection is improved, but the device complexity increases
Solution Approach 1:
Each shield serves multiple functions: the first shield protects the receiver from EMI, the second shield protects the transmitter from EMI, and the third shield provides additional rear protection. This multi-functional design achieves comprehensive EMI protection without requiring excessive additional components.
Solution Approach 2:
The multiple shields are integrated into a single housing structure, with each shield positioned and configured to work together as a unified shielding system. This merging approach provides comprehensive protection while maintaining structural coherence and avoiding excessive complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively minimizes EMI and crosstalk, ensuring reliable signal transmission by providing comprehensive shielding and heat management, maintaining the optical transceiver components within a safe temperature range.
Implementation Method 1
A housing shield is an efficient method of protecting an optical connector from EMI
Implementation Method 2
This information is sent through optical fibers, which are thin, cylindrical wires made of optical glass
Data Source
AI summary
An electromagnetic interference (EMI) shield for an optical connector. The EMI shield has a socket housing with a base and a canopy. The socket housing also has a front and a rear opening. The EMI shield contains an optical transceiver that is placed near the rear opening of the socket housing and contains two components used for signal conversion from optical and electrical signals. The EMI shield further contains a rear housing that is placed near the rear opening of the socket housing for maintaining the optical transceiver in a predetermined position. The EMI shield also contains a rear shield that is at the rear opening of the socket housing and a front shield that includes two, independent, optical sub-housing shields.