Modular RF Shielding Blocks for Compact PCBs
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Solution Overview
Problem
Conventional RF shielding methods, such as metal structures, often require significant space and can be cumbersome, especially in compact devices like smartphones and wearable technology, where they may also be prone to mechanical damage from shocks or overbalancing.
Innovation Solution
A modular RF shielding system comprising conductive blocks with supporting legs and ceilings that can be attached to a printed circuit board (PCB) without needing additional holes, allowing for a compact design that can be easily assembled into a shielding frame, using conductive materials for effective radio frequency shielding and potentially serving as a heat transfer mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal structures are used for RF shielding, then effective radio frequency shielding is achieved, but significant space is required and the structure becomes cumbersome
Solution Approach 1:
The RF shielding structure is divided into multiple separate components: a base structure with supporting legs that attach to the PCB, and a separate top cover. This segmentation allows each component to be optimized independently and reduces the overall space required compared to a single large metal enclosure.
Solution Approach 2:
The shielding structure utilizes vertical space by incorporating supporting legs that elevate the top cover above the PCB surface. This three-dimensional arrangement allows the shielding to be effective while occupying less horizontal area on the PCB, transforming the problem from a two-dimensional footprint issue to a three-dimensional space utilization solution.
2Reliability
If conventional metal structures are used for RF shielding, then effective radio frequency shielding is achieved, but the structure becomes prone to mechanical damage from shocks or overbalancing
Solution Approach 1:
The supporting legs are designed with sufficient length and structural characteristics to provide mechanical cushioning and shock absorption before forces can reach the delicate PCB components. This preliminary protective structure absorbs mechanical stress from shocks and prevents direct transmission to the electronics.
Solution Approach 2:
The top cover is designed as a thin-walled structure that provides RF shielding functionality while being inherently more resistant to mechanical damage compared to rigid conventional metal enclosures. The thin-walled design flexibility allows it to better withstand mechanical stress without catastrophic failure.
3Stability of the object's composition
If additional holes are made in the PCB for mounting shielding structures, then secure attachment is achieved, but the PCB structure is compromised and space is consumed
Solution Approach 1:
The supporting legs are designed to attach to the PCB using existing PCB mounting holes that are already present for component installation. The shielding structure utilizes these pre-existing features for attachment, eliminating the need for additional holes and allowing the structure to serve itself for mounting purposes.
Solution Approach 2:
The supporting legs serve multiple functions: they provide mechanical support for the top cover, enable attachment to the PCB using existing mounting holes, and contribute to the overall structural stability. This multi-functionality reduces the need for dedicated mounting features that would consume additional PCB space.
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 saves space on the PCB, enhances mechanical stability, and allows for flexible adaptation to device shapes, improving RF shielding efficiency while preventing damage from mechanical stress.
Implementation Method 1
Electromagnetic shielding that blocks radio frequency electromagnetic radiation... The shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields
Implementation Method 2
using conductive materials for effective radio frequency shielding and potentially serving as a heat transfer mechanism
Data Source
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AI summary
In an embodiment, modular RF shielding is disclosed. According to an embodiment, a device is disclosed comprising: at least one radio frequency shielding block including: an electrically conductive wall configured to radio frequency shielding; an electrically conductive portion of a ceiling, wherein the portion of the ceiling is connected to the wall; at least one support element, or the shape of the modular block itself, is extending transversely from the wall and configured to uphold the wall, wherein the support element is configured to rest against a portion of a printed circuit board and a length of the support element is shorter than a length of the block; wherein the wall is configured next to an electrical component of the printed circuit board and wherein the electrical component is configured at least partly beneath the portion of the ceiling. Other embodiments relate to manufacturing method for modular RF shielding.