Non-Rectangular Combline Waveguide Filter for Precise 3D Printing
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Solution Overview
Problem
Conventional combline waveguide filters are complex and costly to manufacture due to machining and assembly requirements, and their weight is significant, while additive manufacturing processes face challenges with cantilevered surfaces and oblique printing that degrade precision and increase manufacturing tolerances.
Innovation Solution
A combline waveguide filter with non-rectangular resonator cavities and irises, manufactured using additive manufacturing, allowing for precise printing without overhangs and reducing assembly needs, thus lowering weight and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional machining and assembly methods are used to manufacture combline waveguide filters, then manufacturing precision can be maintained, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent merges multiple discrete components (resonator cavities, irises, and support structures) into a single monolithic structure manufactured by additive manufacturing. This eliminates the need for separate machining and assembly operations, reducing device complexity while maintaining manufacturing precision through the inherent capabilities of additive manufacturing processes.
Solution Approach 2:
The additive manufacturing process serves multiple functions simultaneously: it creates complex 3D geometries, forms precise internal cavities and irises, and produces the final filter structure in one operation. This multi-functionality replaces the traditional sequence of machining different components and assembling them, reducing overall device complexity.
2Strength
If conventional machining and assembly methods are used, then structural integrity is maintained, but manufacturing cost and time increase
Solution Approach 1:
By combining all filter components into a single monolithic structure manufactured in one additive printing process, the patent eliminates multiple machining operations and assembly steps. This significantly improves manufacturing efficiency and productivity while maintaining structural integrity through the continuous material structure inherent in additive manufacturing.
Solution Approach 2:
The additive manufacturing process performs preliminary structuring of all components simultaneously during the printing process itself, rather than requiring separate machining and assembly operations afterward. This preliminary formation of complex geometries and connections improves manufacturing efficiency while ensuring structural integrity from the outset.
3Weight of stationary object
If additive manufacturing is used with traditional rectangular resonator designs, then weight is reduced, but manufacturing precision deteriorates due to cantilevered surfaces
Solution Approach 1:
The patent employs asymmetric, non-rectangular resonator cavity geometries that are specifically designed to eliminate cantilevered surfaces and overhangs. These asymmetric shapes allow the filter to be manufactured by additive printing in a single orientation without requiring support structures, thereby maintaining manufacturing precision while achieving weight reduction through the additive manufacturing process.
Solution Approach 2:
The patent transitions from traditional rectangular geometries to three-dimensional non-rectangular shapes that optimize the printing orientation. By designing cavities with slopes and contours that avoid horizontal overhangs, the filter can be printed vertically without support structures, maintaining precision while reducing weight through the additive process.
4Manufacturing precision
If non-rectangular resonator cavities are used, then additive manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the geometric complexity of non-rectangular resonator cavities with the manufacturing simplicity of additive printing. By merging all components into a single monolithic structure with optimized printing-oriented geometries, the apparent geometric complexity is actually simplified through the manufacturing process, achieving high precision without increasing overall device 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 new design facilitates high-precision additive printing, reduces manufacturing time and cost, and results in a lighter, more compact filter with improved selectivity and frequency characteristics.
Implementation Method 1
The filter may be manufactured by a process including an additive manufacturing step, for example of the SLM type in which a laser or electron beam melts or sinters several thin layers of a powder material.
Implementation Method 2
The filter may be manufactured by a process including an additive manufacturing step, for example of the SLM type in which a laser or electron beam melts or sinters several thin layers of a powder material.
Implementation Method 3
The filter may be manufactured by a process including an additive manufacturing step, for example of the SLM type in which a laser or electron beam melts or sinters several thin layers of a powder material.
Data Source
AI summary
A combline waveguide filter obtained by additive printing, including several resonators connected to each other by irises. Each resonator includes a cavity with a longitudinal axis, a transverse axis and a vertical axis. Each cavity is delimited in particular by two walls each extending in a plane perpendicular to the longitudinal axis. Each cavity may include a post extending parallel to the vertical axis inside the cavity. The cross-section of the cavities is non-rectangular.