Segmented Waveguide Gasket for Low RF Leakage Sealing
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Solution Overview
Problem
Existing waveguide gasket arrangements fail to effectively seal gaps between waveguide sections at higher frequencies, leading to increased RF leakage and loss, while being cost-inefficient due to the need for high-quality materials and complex designs that degrade electrical performance.
Innovation Solution
A waveguide gasket arrangement featuring multiple electrically conducting members connected to common structures, with each member positioned between adjacent conducting structures and aligned apertures to ensure reliable contact and low RF losses, manufactured from metal sheets using punching techniques for simplicity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resilient gaskets are used to seal gaps between waveguide sections, then sealing effectiveness is improved, but waveguide dimensions change and transmission properties deteriorate at higher frequencies
Solution Approach 1:
The gasket is divided into multiple discrete electrically conducting members (fingers) rather than using a continuous resilient ring. This segmentation allows each finger to independently contact the waveguide surface without collectively expanding into the waveguide passage, maintaining dimensional stability while providing effective electrical contact for sealing at higher frequencies
Solution Approach 2:
The gasket structure transitions from a uniformly resilient material to localized discrete conducting fingers with specific geometric properties. Each finger has optimized dimensions and spacing to provide point-contact sealing without the bulk material expansion problem, creating local electrical contact zones that maintain waveguide transmission properties
2Reliability
If silicon rubber gaskets with conductive material are used, then sealing performance is improved, but material losses increase significantly at higher frequencies
Solution Approach 1:
The conductive material is extracted from the bulk resilient rubber matrix and replaced with discrete metal fingers. This removes the lossy dielectric material from the RF signal path while retaining the mechanical compliance needed for sealing, thereby eliminating the frequency-dependent losses associated with silicon rubber
Solution Approach 2:
The gasket structure combines discrete metal conducting members with a minimal resilient substrate or mounting structure. This composite approach provides the electrical conductivity of metal for RF signal integrity while using only minimal resilient material for mechanical compliance, avoiding the losses inherent in fully rubber-based solutions
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 with low RF leakage and cost-effectiveness by maintaining signal transfer efficiency across waveguide interfaces without significant cost increases, even at higher frequencies.
Implementation Method 1
a first plurality of electrically conducting members (5) connected to a first common structure (6) along a first circumference (7) of the waveguide gasket arrangement (1), a second plurality of electrically conducting members (8) connected to a second common structure (9) along a second circumference (10) of the waveguide gasket arrangement (1)
Implementation Method 2
the waveguide gasket arrangement (1) is arranged for electrically sealing a waveguide interface (2) between a first waveguide end (3) and a second waveguide end (4)... the electromagnetic field can partly escape the waveguide arrangement which affects return loss and transition loss
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present disclosure relates to a waveguide gasket arrangement (1, 1') arranged for electrically sealing a waveguide interface (2) between a first waveguide end (3) and a second waveguide end (4), where the waveguide gasket arrangement (1, 1') comprises a first plurality of electrically conducting members (5) connected to a first common structure (6) along a first circumference (7).The waveguide gasket arrangement (1) further comprises a second plurality of electrically conducting members (8) connected to a second common structure (9) along a second circumference (10). For each one of the first plurality of electrically conducting members (5) and the second plurality of electrically conducting members (5) there is: - a corresponding first sub-plurality of electrically conducting members (11, 12) which are intended to contact a waveguide end (3, 4), and - a second sub-plurality of electrically conducting members (13, 14) which are intended to contact a corresponding intermediate electrically conducting structure (15; 24, 25) that is positioned between the first plurality of electrically conducting members (5) and the second plurality of electrically conducting members (8).