Waveguide Filter Rib Segmentation for Junction Line Routing
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Solution Overview
Problem
Conventional waveguide filters have large dimensions due to impedance matching requirements and manufacturing discrepancies, leading to uneven surfaces and noise generation when the junction line passes through ribs, affecting impedance matching.
Innovation Solution
A waveguide filter design featuring a rib structure with sections extending on straight lines and perpendicular to the inner wall, allowing a gap of 0.1 to 1.2 mm between sections, enabling the junction line to pass through without compromising performance, facilitating complex structure design and mass production without deteriorating electromagnetic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the junction line is kept away from the ribs to prevent noise, then the surface smoothness is maintained, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The rib structure is segmented into multiple sections (first section and second section) separated by a gap. This segmentation allows the junction line to pass through the gap without creating uneven surfaces, while each section maintains its filtering function. The segmentation resolves the contradiction by allowing the junction line to intersect the rib structure without compromising surface smoothness or generating noise.
Solution Approach 2:
The gap is specifically positioned at the location where the junction line passes through the rib structure. This local modification creates a targeted solution: the gap distance is controlled to be between 0.05 to 1.2 times the rib width, which is sufficient to allow the junction line to pass through without creating significant impedance variations or noise, while maintaining the overall rib structure's filtering performance.
2Ease of manufacture
If the junction line passes through the rib structure, then the manufacturing is simplified, but the surface becomes uneven due to manufacturing discrepancies, generating noise
Solution Approach 1:
The rib is divided into discrete sections with a controlled gap between them. This segmentation allows the junction line to pass through the gap during assembly without requiring precise positioning, thereby simplifying manufacturing. The gap acts as a tolerance buffer that accommodates manufacturing discrepancies while preventing the formation of uneven surfaces that would generate noise.
Solution Approach 2:
The gap serves as an intermediary element between the first and second sections of the rib. It provides a controlled space that allows the junction line to pass through without directly contacting the rib surfaces, thereby mediating between the manufacturing simplicity of having the junction line pass through and the noise prevention requirement of maintaining surface smoothness.
3Ease of manufacture
If a gap is introduced in the rib structure to allow junction line passage, then the manufacturing is facilitated, but the impedance matching may be affected
Solution Approach 1:
The gap distance is carefully controlled within a specific range (0.05 to 1.2 times the rib width) to optimize the balance between manufacturing ease and impedance matching. This parameter control ensures that the gap is large enough to facilitate assembly and allow junction line passage, but small enough to minimize its impact on the electromagnetic field distribution and impedance characteristics of the waveguide filter.
Solution Approach 2:
The gap is positioned specifically at the location where the junction line passes through the rib structure, creating a localized modification rather than a general structural change. This local quality approach ensures that the impedance matching is maintained in other critical areas of the rib structure while allowing manufacturing flexibility at the specific gap location.
Data Source
AI summary
A waveguide filter is provided. The waveguide filter includes a pipe and a first rib structure. The pipe includes a first inner wall. The first rib structure includes a first rib. The first rib is disposed in the pipe and formed on the first inner wall. The first rib includes a first section and a second section, wherein the first section and the second section extend on a first straight line and are perpendicular to the first inner wall, and a first gap is formed between the first section and the second section, and a first gap distance of the first gap is between 0.1 to 1.2 mm.