Modular Housing Corner Insert Mitigates Slot Antenna EMI
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Solution Overview
Problem
Traditional unitary extruded housing designs for electronic devices are inflexible and costly, and the gaps between corner profiles and sheet metal walls in modular designs act as slot antennas, complicating electromagnetic compatibility (EMC) due to electromagnetic interference (EMI).
Innovation Solution
A modular housing design featuring corner profiles with recesses and sliding sheet metal walls, along with spring-biased inserts that apply pressure to create electrical contact between conductive surfaces to dissipate EMI, enhancing EMC by eliminating gaps and providing flexibility in size and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If modular housing design with corner profiles and sheet metal walls is used, then flexibility in size and shape and manufacturing cost are improved, but gaps between components create slot antenna effects that worsen electromagnetic compatibility
Solution Approach 1:
A conductive bridge element is introduced as an intermediary component between the corner profile and sheet metal wall. This bridge element fills the gap and provides electrical continuity, eliminating the slot antenna effect while preserving the modular assembly structure and its manufacturing advantages.
Solution Approach 2:
The electrical conductivity parameter is applied to the bridge element to transform it into an effective EMI shield. By changing the material parameter (using conductive material), the bridge element actively counteracts the harmful electromagnetic effects created by the physical gap.
2Ease of manufacture
If modular housing design with corner profiles and sheet metal walls is used, then manufacturing cost is reduced, but gaps between components create slot antenna effects that complicate EMC
Solution Approach 1:
A conductive bridge element is introduced as an intermediary component between the corner profile and sheet metal wall. This bridge element fills the gap and provides electrical continuity, eliminating the slot antenna effect while preserving the modular assembly structure and its manufacturing advantages.
Solution Approach 2:
The housing system combines different materials: the structural components (corner profiles and sheet metal walls) can be made from cost-effective modular materials, while the bridge element uses conductive material specifically for EMI mitigation. This composite approach balances manufacturing cost with EMC performance.
3Ease of operation
If gaps are left between corner profiles and sheet metal walls, then assembly flexibility is improved, but slot antenna effects worsen electromagnetic interference mitigation
Solution Approach 1:
A conductive bridge element is introduced as an intermediary component between the corner profile and sheet metal wall. This bridge element fills the gap and provides electrical continuity, eliminating the slot antenna effect while preserving the modular assembly structure and its manufacturing advantages.
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 modular design effectively mitigates EMI by ensuring electrical contact and reducing slot antenna effects, thereby improving EMC while allowing for cost-effective and flexible housing configurations.
Implementation Method 1
an insert having a spring bias in the slot adjacent to the wall, the insert pressing the wall to abut the profile
Implementation Method 2
at least a portion of the wall is electrically conductive; and at least a portion of the profile is electrically conductive
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
A housing (101,201,301,401) design and method of providing electromagnetic compatibility (EMC) by mitigating a slot (314,316) antenna in a corner region of a housing (101,201,301,401), the corner profile (220,320,420,520) including an electrically conductive insert (324,424, 424a,424b, 624,624a,824) that has a spring bias, such as a spring or coated plastic member, in a corner of the housing (101,201,301,401).