Electronic Assembly Electromagnetic Shielding With Grounded Pedestals
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Solution Overview
Problem
Existing electronic assemblies face issues with radio frequency interference due to components emitting electromagnetic signals that interfere with other circuitry, necessitating improved electromagnetic shielding.
Innovation Solution
An electromagnetic interference shield comprising metallic walls and conductive pedestals that surround interference-generating components, providing a low impedance path to ground and confining electromagnetic interference within a walled structure, combined with conductive traces on the circuit board for effective shielding and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic shielding structures are added to reduce radio frequency interference, then electromagnetic compatibility is improved, but device complexity increases
Solution Approach 1:
The metallic pedestal serves multiple functions: it provides mechanical support for the interference-generating component, establishes electrical connection to ground for EMI shielding, and facilitates heat dissipation. This multi-functionality reduces the need for separate shielding structures, thereby improving electromagnetic compatibility while minimizing increases in device complexity.
Solution Approach 2:
The patent combines the shielding function with the existing pedestal structure by making it metallic and electrically connected to ground. Instead of adding a separate shielding enclosure, the pedestal itself is transformed into a shielding element, merging support, grounding, and EMI protection functions into a single component.
2Reliability
If metallic shielding walls are used to confine electromagnetic interference, then electromagnetic compatibility is improved, but manufacturing complexity increases
Solution Approach 1:
The metallic pedestal simultaneously provides mechanical support, electrical grounding for EMI shielding, and thermal management functions. This eliminates the need for separate shielding components, improving electromagnetic compatibility while simplifying manufacturing by reducing the number of parts and assembly steps.
Solution Approach 2:
The shielding function is merged into the pedestal structure itself rather than being implemented as a separate component. The pedestal is designed as a single integrated piece that provides both structural support and EMI shielding through its metallic construction and electrical connection to ground, thereby reducing manufacturing 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 reduces electromagnetic interference within the electronic assembly and its propagation range, ensuring compliance with regulatory standards and efficient heat dissipation, thereby maintaining optimal operational performance.
Implementation Method 1
The walled structure is configured to confine or shield substantially the electromagnetic interference within the one or more metallic walls or within a cavity formed by the one or more metallic walls and a metallic side of the first enclosure portion
Implementation Method 2
A primary electrically conductive pedestal projects above a base of the first enclosure portion within the one or more metallic walls to facilitate contact between the primary electrically conductive pedestal and the primary interference-generating component to provide a viable or possible low impedance path to electrical ground
Data Source
AI summary
A walled structure surrounds a primary interference-generating component. The walled structure is configured to confine or shield substantially the electromagnetic interference within the one or more metallic walls or within a cavity formed by the one or more metallic walls and a metallic side of the first enclosure portion. A primary electrically conductive pedestal projects above a base of the first enclosure portion within the one or more metallic walls to facilitate contact between the primary electrically conductive pedestal and the primary interference-generating component to provide a viable or possible low impedance path to electrical ground for a portion of the electromagnetic interference within the one or more metallic walls.