Optical Module Housing With Conductive Sheet Shielding
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Solution Overview
Problem
Optical modules in fiber-optic communication systems face electromagnetic interference issues due to the electromagnetic fields generated by electric components, which affect signal transmission and processing rates and accuracy, and are also susceptible to external electromagnetic interference, necessitating effective shielding solutions.
Innovation Solution
The optical module employs a housing divided into upper and lower portions with U-shaped sides and convex blocks to form a cavity, incorporating electro-conductive sheets and metal vertical ribs for enhanced electromagnetic shielding, using materials like silver, copper, and alloys for improved conductivity and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electric components are enclosed in a metal housing to achieve electromagnetic isolation, then electromagnetic shielding effect is improved, but device complexity increases due to the need for upper and lower housing portions with convex blocks and electro-conductive sheets
Solution Approach 1:
The housing is divided into an upper housing portion and a lower housing portion that can be separately manufactured and then assembled together. This segmentation allows for easier manufacturing and assembly while still achieving the required electromagnetic shielding effect when combined with convex blocks and electro-conductive sheets at the joining interface.
Solution Approach 2:
Electro-conductive sheets are introduced as intermediary elements between the upper and lower housing portions. These sheets, positioned within convex blocks at the housing interface, provide continuous electromagnetic shielding across the joint while maintaining structural integrity and ease of assembly.
2Object-affected harmful factors
If a metal housing is used for electromagnetic shielding, then electromagnetic isolation is improved, but manufacturing difficulty increases due to precision requirements for convex block fitting
Solution Approach 1:
Convex blocks are pre-formed and integrated into the housing portions during manufacturing, with predetermined positions and dimensions. This preliminary action ensures that when the upper and lower housing portions are assembled, the convex blocks automatically align to create proper gaps for electro-conductive sheets, reducing the need for precision adjustment during final assembly.
Solution Approach 2:
The dimensions and positions of convex blocks are carefully designed with specific parameters that create optimal gaps for electro-conductive sheets. By controlling these geometric parameters during manufacturing, the housing assembly achieves both electromagnetic shielding effectiveness and ease of assembly without requiring high-precision fitting operations.
3Ease of manufacture
If gaps are left between housing portions for assembly, then ease of assembly is improved, but electromagnetic shielding effect deteriorates
Solution Approach 1:
Electro-conductive sheets serve as intermediary shielding elements that are positioned within gaps between housing portions. These sheets bridge the discontinuity created by assembly gaps, maintaining electromagnetic shielding effectiveness while allowing the housing to be easily assembled from separate upper and lower portions.
Solution Approach 2:
Thin electro-conductive sheets are used to fill and seal gaps between housing portions. These flexible thin film structures can conform to the gap geometry while providing continuous electromagnetic shielding, allowing assembly ease without compromising shielding performance.
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
This design effectively shields electromagnetic interference, maintaining signal integrity and protecting internal components from external electromagnetic influences while withstanding harsh environments.
Implementation Method 1
An electro-conductive sheet is disposed between the at least one first convex block, the at least one second convex block and the at least one third convex block
Implementation Method 2
a housing of the optical module may be made of a metal material... to achieve electromagnetic isolation
Data Source
AI summary
An optical module comprising an upper portion of the housing with a bottom and two sides, a lower portion of the housing with a bottom and two sides, an electric component and an electroconductive sheet is provided. The two sides of the upper portion may be inserted between the two sides of the lower portion to form a relatively closed cavity for accommodating the electric component. A first convex block provided on the sides of the upper portion may be inserted into a gap which is formed between a second convex block and a third convex block provided on the sides of the lower portion. Thus, the first convex block, the second convex block and the third convex block may clamp the electroconductive sheet, thereby dividing the gap at the junction of the upper portion and the lower portion into a plurality of tiny gaps.