Coaxial Filter Resonator Structure Without Screw Tuning

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing coaxial filters face limitations in miniaturization and power capacity due to screw-based adjustments, which also generate metal chips and degrade performance.

Innovation Solution

A coaxial filter design featuring a resonator with integrally formed elastic pieces and operation holes on a cover plate, allowing frequency adjustment without screws, and a coupling adjustment member to enhance electromagnetic coupling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If a screw adjustment method is used to adjust the resonator height, then the frequency can be adjusted, but the product volume cannot be reduced and power capacity cannot be increased at the same volume

Engineering Contradiction:

Improveproduct volumeVSAvoidfrequency adjustment capability

Core Design Contradiction:

Volume of moving objectVSEase of operation

Solution Approach 1:

The patent removes the screw from the adjustment mechanism, extracting the harmful element that limited miniaturization. The resonator is directly supported by elastic pieces on the cover plate, eliminating the need for screw-based height adjustment while maintaining frequency tuning capability through alternative means.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical screw adjustment system with an elastic support system. The elastic pieces provide both mechanical support and adjustment capability through their deformation properties, substituting the traditional screw-mechanism with a more compact elastic-mechanism that enables miniaturization.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If a screw adjustment method is used, then frequency adjustment is possible, but metal chips are generated resulting in reduced product performance

Engineering Contradiction:

Improveproduct performanceVSAvoidmetal chips

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent extracts and removes the screw component that generates metal chips during adjustment. By eliminating the screw entirely and using elastic pieces for support and adjustment, the source of metal chip generation is removed, thereby improving product reliability and performance.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent converts the potential harm of metal chip generation into a benefit by using elastic pieces that can be deformed and adjusted without generating harmful particles. The elastic deformation provides the necessary adjustment capability while avoiding the harmful byproduct of metal chip generation.

Inventive Principle:

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

3Length of moving object

If a screw is used for resonator adjustment, then height adjustment is achievable, but the design cannot be further miniaturized

Engineering Contradiction:

Improveresonator height adjustmentVSAvoidproduct volume

Core Design Contradiction:

Length of moving objectVSVolume of moving object

Solution Approach 1:

The patent substitutes the screw-based mechanical adjustment system with an elastic piece-based system. The elastic pieces can be deformed to adjust resonator height while occupying minimal space, enabling height adjustment functionality without the volume penalty of traditional screw mechanisms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses elastic pieces that function as flexible elements to provide height adjustment. These elastic components can be compressed or extended to achieve the required resonator height adjustment while maintaining a compact form factor that enables miniaturization.

Inventive Principle:

Principle #30Flexible shells and thin films

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

Enables reduced product volume, increased power capacity, and improved performance by eliminating screw-induced metal chips and simplifying adjustments.

Implementation Method 1

the resonator includes multiple elastic pieces, a connection portion, and a body portion which are sequentially connected from one end to another end

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the housing has a resonant cavity, the cover plate corresponds to the resonant cavity and covers the housing

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS12412969B2Coaxial filter and communication radio frequency device

Publication Date: 2025.09.09 SUZHOU LUXSHARE TECH CO LTD

AI summary

Provided are a coaxial filter and a communication radio frequency device. The communication radio frequency device includes the coaxial filter. The coaxial filter includes a housing having a resonant cavity, a cover plate, and a resonator. The cover plate corresponds to the resonant cavity and covers the housing. The resonator includes plurality of elastic pieces, a connection portion, and a body portion which are sequentially connected from one end to another end. The connection portion is connected to a bottom of the resonant cavity.