PCB Meandering Trace Filters with Dissipative Metal Layers
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Solution Overview
Problem
Existing passive electrical signal filtering devices, such as lumped element filters and metal powder filters, become labor-intensive and complicated to manufacture as performance requirements increase, necessitating a more efficient and adaptable filtering solution.
Innovation Solution
The use of printed-circuit board (PCB)-based passive electrical filters with meandering, coil, or spiral signal paths and dissipative metal layers to achieve efficient filtering, incorporating superconducting materials for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional lumped element filters or metal powder filters are used to meet higher performance requirements, then filtering performance is improved, but manufacturing complexity and labor intensity increase
Solution Approach 1:
The patent changes the geometric parameters of the PCB trace (creating meandering, coil, or spiral patterns) to transform a simple conductive path into an effective inductor. This allows the trace itself to provide inductance without requiring separate lumped element inductors, thereby improving filtering performance while maintaining simple PCB-based manufacturing
Solution Approach 2:
The PCB trace serves multiple functions simultaneously: it provides electrical connection between components and inherently provides inductance through its meandering geometry. This multi-functionality eliminates the need for separate inductor components, reducing manufacturing complexity while achieving the required filtering performance
2Manufacturing precision
If larger inductance and capacitance values are required for effective filtering, then filtering effectiveness is improved, but device size increases
Solution Approach 1:
The patent uses meandering, coil, or spiral trace patterns that exploit the two-dimensional plane of the PCB to create long effective path lengths within a compact footprint. By transforming a straight-line connection into a multi-dimensional pattern, the design achieves large inductance values without proportionally increasing the device area
3Manufacturing precision
If complex filtering structures are implemented to meet performance requirements, then filtering performance is improved, but assembly and maintenance difficulty increase
Solution Approach 1:
The patent merges the filtering function with the existing PCB trace structure. Instead of adding separate filtering components that would complicate assembly, the trace itself is designed with meandering or spiral patterns that inherently provide the required inductance, thereby achieving complex filtering performance through simple PCB fabrication processes
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 PCB-based filters provide effective frequency filtering with increased inductance and capacitance within a compact design, simplifying assembly and maintenance while meeting demanding performance requirements.
Implementation Method 1
a first dissipation layer that includes a dissipative metal, wherein at least a portion of the dissipative metal is communicatively coupled to at least a portion of the first continuous conductive trace on the dielectric substrate
Implementation Method 2
a first continuous conductive trace carried by the dielectric substrate layer that forms a first circuitous route for connecting two points on the dielectric substrate
Data Source
AI summary
An electronic filtering device includes continuous trace on a dielectric substrate and a dissipation layer communicatively coupled to the trace. The dissipation layer may include disconnected metal particles, which may be embedded in a substrate, for example in an epoxy. The continuous trace may be meandering, for example crenulated, coil or spiral signal path. At least a second continuous trace may be spaced from the first by the substrate, and conductively coupled by a via. The electronic filtering device may be used in one or more printed circuit boards (PCBs) that form stages of an input/output system.