Coaxial Input Coupler Buffer Structure for Welding Distortion

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Welding distortion in waveguides of high-frequency input couplers often leads to incomplete connection of the inner conductor with the waveguide, especially when distortion is significant.

Innovation Solution

A high-frequency input coupler design featuring a deformable buffer between the inner conductor support and the inner conductor connection unit, allowing for flexible connection despite welding-induced distortion, using a copper plate with a thickness of 0.8 mm and annular shape, and a bend configuration to facilitate deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If welding is used to assemble waveguides, then the waveguide components can be connected, but welding distortion occurs which prevents complete connection of the inner conductor to the waveguide

Engineering Contradiction:
Improvewaveguide assemblyVSAvoidinner conductor connection
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The buffer is designed to be deformable rather than rigid, allowing it to dynamically adapt to welding distortions. The buffer can elastically deform to compensate for dimensional changes in the waveguide caused by welding heat, maintaining electrical connection without requiring perfect manufacturing precision.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The buffer acts as an intermediary element between the inner conductor support and the inner conductor connection unit. It mediates the connection by absorbing welding-induced distortions through its deformable structure, allowing the inner conductor to remain electrically connected even when the waveguide geometry changes due to welding.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Manufacturing precision

If heat treatment is performed to remove welding distortion, then some distortion can be reduced, but distortion is not completely removed and remains in the waveguide

Engineering Contradiction:
Improvewelding distortionVSAvoidheat treatment process
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

Instead of trying to completely eliminate welding distortion through complex heat treatment processes, the invention converts the harmful distortion into a manageable condition by using a deformable buffer that adapts to the distorted geometry. The buffer's deformability transforms the problem of distortion into a solution where the connection mechanism itself accommodates the distortion.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Stability of the object's composition

If a rigid connection structure is used between inner conductor support and connection unit, then structural stability is maintained, but connection fails when waveguide distortion is present

Engineering Contradiction:
Improveconnection structureVSAvoidinner conductor connection
Core Design Contradiction:
Stability of the object's compositionVSReliability

Solution Approach 1:

The buffer changes its physical parameters (shape, position) in response to welding distortions while maintaining electrical continuity. By allowing controlled deformation of the buffer, the system maintains reliability of the electrical connection even when the geometric parameters of the waveguide change due to welding heat.

Inventive Principle:
Principle #35Parameter changes

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 deformable buffer effectively absorbs and compensates for welding-induced distortions, ensuring reliable electrical connection of the inner conductor to the waveguide, even in the presence of residual distortion.

Implementation Method 1

a deformable buffer between the inner conductor support and the inner conductor connection unit

Methodology Applied
Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS12580287B2High-frequency coaxial input coupler including a transmission window that couples a waveguide to an acceleration cavity
Publication Date: 2026.03.17 CANON ELECTRON TUBES & DEVICES CO LTD
  • US12580287B2 patent drawing
  • US12580287B2 patent drawing
  • US12580287B2 patent drawing

AI summary

According to one embodiment, an high-frequency input coupler installed between a waveguide and an acceleration cavity to input high-frequency waves from the waveguide to the acceleration cavity, a coaxial waveguide conversion unit includes a high-frequency transmission window structure connection unit that connects the high-frequency transmission window structure and an inner conductor connection unit that connects an inner conductor which includes an inner conductor support on a side of the inner conductor connection unit, and the high-frequency input coupler includes an electrically connectable and deformable buffer between the inner conductor support and the inner conductor connection unit.