Conductive Separating Walls for EMI Shielding in Metallic Housings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Devices with metallic housings, designed to reduce electromagnetic radiation interference, face a challenge as plug-connector sections require cutouts that compromise shielding and electromagnetic compatibility.
Innovation Solution
The device employs two electrically conductive separating walls to subdivide the housing into two Faraday cages, isolating electromagnetic circuit components from electromechanical plug components, thereby minimizing radiation transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a metallic housing is used to shield electromagnetic radiation, then electromagnetic compatibility is improved, but plug-connector sections require cutouts that reduce shielding effectiveness
Solution Approach 1:
The housing is segmented into multiple sections with separating walls that create isolated chambers. The first separating wall divides the housing into a first accommodation-chamber section for circuit components and a second accommodation-chamber section for plug components, allowing each section to maintain shielding integrity independently while accommodating different functional requirements
Solution Approach 2:
Different regions of the housing are assigned different functions and shielding requirements. The first accommodation-chamber section maintains complete shielding for electromagnetic-sensitive circuit components, while the second accommodation-chamber section allows controlled access for plug components, optimizing shielding effectiveness locally where needed
2Ease of operation
If cutouts are provided in the metallic housing for plug components, then electrical connection to surroundings is enabled, but shielding of electromagnetic radiation is reduced
Solution Approach 1:
The housing is divided into isolated chambers using separating walls, allowing plug components to be contained in a dedicated second accommodation-chamber section. This segmentation enables electrical connection functionality without compromising the shielding integrity of the main housing structure, as each chamber can be independently optimized for its specific function
Solution Approach 2:
The separating walls act as intermediary structures that physically and electrically separate different functional zones. The first separating wall mediates between the circuit component area and plug component area, allowing controlled interaction while maintaining electromagnetic isolation between the two sections
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 configuration enhances electromagnetic compatibility by effectively damping electromagnetic radiation waves, ensuring they do not interfere with external components, while maintaining electrical connectivity.
Implementation Method 1
The first separating wall and the second separating wall extend substantially in a common plane and subdivide the accommodation chamber of the housing into a first accommodation-chamber section on a first side of the two separating walls and into a second accommodation-chamber section on a second side, opposite the first side, of the two separating walls
Data Source
AI summary
A housing has electrically conductive top and bottom parts which together form an accommodation chamber. A circuit board is arranged in the accommodation chamber. A bottom side of the circuit board is connected electrically to the top side via conductive bores. The circuit board has circuit components and electromechanical plug components for connecting to components outside the housing. A first electrically conductive separating wall electrically connects the housing top part to the top side of the circuit board. A second electrically conductive separating wall electrically connects the housing bottom part to the bottom side of the circuit board. The first and second separating walls subdivide the accommodation chamber into first and second accommodation-chamber sections that are disposed on opposite sides of the first and second separating walls. The circuit components are accommodated only in the first accommodation-chamber section and the plug components are accommodated only in the second accommodation-chamber section.