Additive Manufacturing for Radio-Frequency Cavity Resonators

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Solution Overview

Problem

The existing methods for manufacturing radio-frequency cavity resonators with tubular structures are costly and inefficient, particularly due to the cumbersome and precise manual adjustments required for mounting drift tubes and support structures, which are prone to manufacturing errors and high material costs.

Innovation Solution

A method involving additive manufacturing, specifically 3D printing, is used to create radio-frequency cavity resonators with a tubular structure and tubular elements, employing a unique geometry for the support structures that allows for parallel manufacturing along the diameter, ensuring high precision and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If traditional manual mounting methods are used for drift tubes and support structures, then manufacturing precision can be achieved, but manufacturing costs increase and productivity decreases

Engineering Contradiction:

Improvemounting precisionVSAvoidmanufacturing efficiency

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent combines the drift tubes and support structures into a single integrated component that is manufactured as one piece using additive manufacturing technology. This eliminates the need for separate mounting operations and manual adjustments, thereby improving both manufacturing precision and productivity simultaneously.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent replaces traditional mechanical mounting methods with additive manufacturing technology. The integrated structure is built layer by layer through 3D printing, substituting the mechanical assembly process with a digital fabrication process that achieves high precision without manual intervention.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Strength

If traditional manufacturing methods are used for RF cavity resonators, then structural integrity can be ensured, but manufacturing costs increase

Engineering Contradiction:

Improvestructural integrityVSAvoidmanufacturing cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent replaces traditional subtractive manufacturing and assembly methods with additive manufacturing. This digital fabrication approach reduces material waste, eliminates assembly costs, and maintains structural integrity through controlled layer-by-layer construction, thereby reducing manufacturing costs while ensuring strength.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes materials suitable for additive manufacturing that provide both structural integrity and electromagnetic performance for RF cavity resonators. The material selection and processing parameters are optimized to ensure the manufactured structure meets the required mechanical and electrical properties at lower cost.

Inventive Principle:

Principle #40Composite materials

3Ease of manufacture

If drift tubes are mounted on external girders with support structures, then assembly is simplified, but manufacturing precision decreases due to cumulative errors

Engineering Contradiction:

Improveassembly simplicityVSAvoidpositioning accuracy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent merges the drift tubes and support structures into a single monolithic component manufactured by additive manufacturing. This eliminates the external girders and separate mounting structures, removing the source of cumulative positioning errors while maintaining assembly simplicity through single-piece fabrication.

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

This approach reduces manufacturing costs and errors, enabling the production of high-quality resonators with a high Q-factor by allowing simultaneous formation of tubular elements and support structures in a single 3D printing process.

Implementation Method 1

producing the entire resonator, or at least longitudinal sections thereof that are subsequently assembled to form the resonator, by additive manufacturing in a manufacturing direction that is parallel to said diameter

Methodology Applied

Scientific EffectAdditive manufacturing (3D printing): 3D Printing

Data Source

PatentUS12464633B2Manufacturing method for radio-frequency cavity resonators and corresponding resonator

Publication Date: 2025.11.04 UNIV DER BUNDESWEHR MUNCHEN

AI summary

A method of manufacturing a radio frequency cavity resonator, wherein said radio frequency cavity resonator comprises a tubular structure extending along a longitudinal axis, said tubular structure comprising a circumferential wall structure surrounding said longitudinal axis, one or more tubular elements and a first and a second support structure associated with each of said tubular elements, wherein said first and second support structures are provided on opposite sides of each tubular element and extend radially along a diameter of the tubular structure, wherein the method comprises producing the resonator by additive manufacturing in a manufacturing direction that is parallel to said diameter.