Additively Manufactured Waveguide Filter Ridges for Low-Loss Passbands
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Solution Overview
Problem
Conventional waveguide antennas and RF components face limitations due to traditional fabrication methods, leading to increased size, weight, and part count, which result in reduced performance and higher costs, especially when trying to achieve high gain and low loss in demanding applications.
Innovation Solution
The development of waveguide filters with optimized ridges for electromagnetic signal selection within a desired frequency passband, utilizing metal additive manufacturing techniques to create complex geometries such as quadrilateral and hexagonal cross-sections with non-orthogonal ridges and radiused edges, allowing for improved performance and integration with other RF components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fabrication methods are used for waveguide antennas and RF components, then manufacturing simplicity is maintained, but size, weight, and part count increase leading to reduced performance and higher costs
Solution Approach 1:
The patent combines multiple waveguide components and RF elements into a single integrated structure fabricated using additive manufacturing. This merging eliminates the need for multiple separate parts, flanges, and interfaces that characterize traditional fabrication methods, thereby reducing size, weight, and part count while improving overall performance and reducing losses.
Solution Approach 2:
The patent utilizes additive manufacturing technology to enable complex geometries and configurations that cannot be achieved with traditional fabrication methods. This parameter change in manufacturing capability allows for optimized waveguide paths, integrated filtering elements, and compact structures that improve performance while reducing complexity.
2Loss of energy
If multi-piece fabrication is used for waveguide structures, then ease of manufacture is maintained, but losses increase and gain decreases due to increased path length and reflections
Solution Approach 1:
The patent integrates multiple waveguide sections and RF components into a single monolithic structure fabricated by additive manufacturing. This eliminates flanges, seams, and interfaces between multiple pieces that cause signal reflections and losses, thereby reducing overall signal loss while maintaining manufacturing feasibility through advanced additive processes.
Solution Approach 2:
The patent segments the waveguide path into optimized sections within a single integrated structure, allowing for minimized total path length and optimized signal flow. The additive manufacturing process enables complex internal geometries and routing that reduce reflections and losses compared to traditional multi-piece assemblies.
3Shape
If complex geometries are created with traditional fabrication methods, then manufacturing capability is maintained, but size, weight, and cost increase significantly
Solution Approach 1:
The patent leverages additive manufacturing technology to create complex waveguide geometries with optimized cross-sections and integrated features that would be extremely difficult or costly to fabricate using traditional methods. This parameter change in manufacturing capability enables complex shapes with minimal impact on weight, as material is added only where structurally necessary rather than through subtractive or assembly processes.
Solution Approach 2:
The patent employs nested geometries and integrated structures where components are embedded within each other in a single fabricated piece. This nesting approach creates complex functional geometries while minimizing overall material usage and weight, as the additive manufacturing process efficiently deposits material only where required for structural and functional purposes.
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 approach enables the fabrication of waveguide filters with enhanced performance and reduced costs by minimizing losses and maximizing gain, while also allowing for the creation of complex geometries that would be difficult or costly with traditional methods.
Implementation Method 1
ridges for selecting electromagnetic signals within a desired frequency passband
Data Source
AI summary
Waveguide filters comprising ridges disposed within a waveguide cavity for selecting electromagnetic signals within a frequency passband. An apparatus includes a waveguide filter comprising a waveguide cavity and a plurality of ridges disposed within the waveguide cavity. The apparatus is such that each of the plurality of ridges comprises a first side and a second side, and wherein the first side and the second side are disposed at a non-orthogonal angle relative to one other. The apparatus is optimized for fabrication using metal additive manufacturing techniques.