Resilient Cantilever Supports for Coaxial Waveguide Converter Heat Dissipation

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Solution Overview

Problem

Conventional coaxial waveguide converter circuits in traveling-wave tubes suffer from reduced heat dissipation capabilities due to non-uniform contact between the coaxial inner conductor and the waveguide matching part, leading to increased temperature and unstable operations.

Innovation Solution

A coaxial waveguide converter circuit with a waveguide matching part featuring a tapered fitting hole and resilient cantilever supports that deform to ensure uniform contact with the coaxial inner conductor, improving heat conduction and preventing temperature rise in the coaxial section and helix.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual operation is used to narrow the fitting hole, then assembly ease is improved, but contact uniformity deteriorates leading to poor heat dissipation

Engineering Contradiction:

Improveassembly easeVSAvoidcontact uniformity

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The waveguide matching part employs resilient cantilever supports that can dynamically adjust their position. The cantilever supports are designed to be elastically deformable, allowing them to automatically adapt to the coaxial inner conductor during assembly and maintain uniform contact pressure, thereby achieving both ease of assembly and contact uniformity

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes the physical state of the waveguide matching part by introducing resiliency through elastic materials or spring mechanisms. This parameter change allows the structure to transition from a rigid, precision-critical component to a flexible, self-adjusting component that maintains uniform contact without requiring high machining accuracy

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If automated operation is used to narrow the fitting hole uniformly, then contact uniformity is improved, but manufacturing cost increases

Engineering Contradiction:

Improvecontact uniformityVSAvoidmanufacturing cost

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The waveguide matching part with resilient cantilever supports is designed to self-adjust and self-align during assembly. The elastic deformation of the cantilever supports automatically ensures uniform contact with the coaxial inner conductor without requiring external automation equipment or complex machining processes, thereby achieving contact uniformity while keeping manufacturing costs low

Inventive Principle:

Principle #25Self-service

3Device complexity

If point contact is achieved between cantilever supports and inner conductor, then device complexity is reduced, but heat dissipation capability deteriorates

Engineering Contradiction:

Improvecontact structure simplicityVSAvoidheat dissipation capability

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The invention merges multiple contact points into a continuous contact surface by designing the cantilever supports to span across the coaxial inner conductor. This combining of discrete contact elements creates an extended contact area that improves heat dissipation capability while maintaining relatively simple device structure

Inventive Principle:

Principle #5Merging (Combining)

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

Enhances heat dissipation capabilities, stabilizes operations, and maintains contact without requiring high machining accuracy or increased manufacturing costs, preventing degraded electric characteristics and discharge.

Implementation Method 1

resilient cantilever supports that deform to ensure uniform contact with the coaxial inner conductor

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

improving heat conduction and preventing temperature rise in the coaxial section and helix

Methodology Applied

Scientific EffectHeat conduction: Conduction (thermal)

Data Source

PatentUS7589469B2Coaxial waveguide converter circuit for traveling-wave tube, method of manufacturing same, and waveguide matching part for use in coaxial waveguide converter circuit

Publication Date: 2009.09.15 NEC NETWORK & SENSOR SYST

AI summary

A coaxial waveguide converter circuit is provided for converting an input/output coaxial section of a traveling-wave tube to a waveguide. The circuit comprises a waveguide matching part for connecting an inner conductor of the coaxial section extending into the waveguide to a wall of the waveguide. The waveguide matching part includes a fitting hole for fitting the inner conductor thereinto, and a plurality of cantilever supports which define the fitting hole at leading end portions thereof. The leading end portions of the plurality of cantilever supports defining the fitting hole are uniformly kept in close contact with a peripheral surface of the inner conductor.