Segmented Waveguide Gasket Layout for Low-Loss RF Sealing
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Solution Overview
Problem
Existing waveguide gasket arrangements face challenges in sealing gaps between waveguide sections efficiently at higher frequencies, leading to increased costs and RF leakage due to the limitations of resilient gaskets and RF gaskets with angled fingers, which degrade in performance and are costly to maintain.
Innovation Solution
A waveguide gasket arrangement comprising multiple electrically conducting members connected to common structures along circumferences, with sub-pluralities contacting waveguide ends and intermediate structures, formed in metal sheets through punching, allowing for efficient signal transfer and low RF losses without significant cost increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resilient gaskets are used to seal gaps between waveguide sections, then sealing capability is improved, but waveguide dimensions are changed and transmission properties are degraded at higher frequencies
Solution Approach 1:
The gasket is segmented into multiple discrete electrically conducting members arranged in a circular pattern, each making contact with the waveguide flange. This segmentation allows the conducting members to maintain electrical continuity without requiring a continuous resilient material that would expand and alter waveguide dimensions.
Solution Approach 2:
The invention changes the material parameter from resilient elastomeric material to rigid or semi-rigid electrically conducting members. This parameter change eliminates the expansion issue at higher frequencies while maintaining electrical conductivity and sealing capability through the discrete conducting elements that contact the flange surfaces.
2Reliability
If silicon rubber gaskets with conductive material are used, then sealing is achieved, but losses increase significantly at higher frequencies requiring better quality materials which increases cost
Solution Approach 1:
The invention replaces the silicon rubber material system with a metal or conductive material system. This substitution eliminates the frequency-dependent loss characteristics of rubber materials while maintaining the sealing function through mechanical contact of the conducting members with the flange surfaces.
3Object-generated harmful factors
If high manufacturing tolerances are used to counteract gaps between waveguide sections, then RF leakage is reduced, but manufacturing cost increases significantly
Solution Approach 1:
The conducting members act as an intermediary element between the two waveguide flanges, making contact with both surfaces to seal the gap. This intermediary component provides the sealing function that would otherwise require extremely tight manufacturing tolerances on the waveguide flanges themselves.
Solution Approach 2:
The invention introduces a gasket component with specific electrical and mechanical parameters that compensate for manufacturing tolerances. The conducting members are designed with appropriate contact pressure and electrical conductivity to seal gaps without requiring high-precision waveguide manufacturing.
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 solution provides improved electrical performance and reliable sealing with low RF leakage across a wide range of frequencies, maintaining durability and cost-effectiveness by using a single-component metal gasket arrangement with aligned apertures for efficient signal transfer.
Implementation Method 1
a first plurality of electrically conducting members connected to a first common structure along a first circumference, and a second plurality of electrically conducting members connected to a second common structure along a second circumference
Data Source
AI summary
The present disclosure relates to a waveguide gasket arrangement arranged for electrically sealing a waveguide interface between a first waveguide end and a second waveguide end, where the waveguide gasket arrangement comprises a first plurality of electrically conducting members connected to a first common structure along a first circumference. The waveguide gasket arrangement further comprises a second plurality of electrically conducting members connected to a second common structure along a second circumference. For each one of the first plurality of electrically conducting members and the second plurality of electrically conducting members there is a corresponding first sub-plurality of electrically conducting members which are intended to contact a waveguide end, and a second sub-plurality of electrically conducting members which are intended to contact a corresponding intermediate electrically conducting structure that is positioned between the first plurality of electrically conducting members and the second plurality of electrically conducting members.