Dielectric Resonator Coupling Structure for Lower Eddy Current Loss

Solution Overview

Problem

Conventional dielectric waveguide resonators experience a decrease in Q value due to concentrated eddy current losses in the coupling conductor, leading to reduced performance.

Innovation Solution

The electronic component features a coupling conductor with multiple coupling portions extending in one direction, forming a frame or L-shape, and incorporating depressions to reduce eddy current generation and enhance bonding strength, while an internal conductor adjusts frequency characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single columnar coupling conductor is used, then the structure is simple, but eddy current loss increases and Q value decreases

Engineering Contradiction:

Improvecoupling conductor structureVSAvoideddy current loss

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The coupling conductor is divided into multiple coupling portions (first, second, third, and fourth coupling portions) that extend in different directions. This segmentation distributes the eddy current paths across multiple segments, reducing the concentration of eddy currents in any single location and thereby reducing overall eddy current loss.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coupling conductor transitions from a single-column structure to a multi-directional structure with portions extending in different directions (e.g., first direction and second direction perpendicular to each other). This dimensional expansion creates more distributed eddy current paths and reduces current concentration.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of manufacture

If a single columnar coupling conductor is used, then the manufacturing is easy, but the Q value is low due to concentrated eddy currents

Engineering Contradiction:

Improvecoupling conductor fabricationVSAvoidQ value

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The coupling conductor is divided into multiple coupling portions (first, second, third, and fourth coupling portions) that extend in different directions. This segmentation distributes the eddy current paths across multiple segments, reducing the concentration of eddy currents in any single location and thereby reducing overall eddy current loss.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coupling conductor transitions from a single-column structure to a multi-directional structure with portions extending in different directions (e.g., first direction and second direction perpendicular to each other). This dimensional expansion creates more distributed eddy current paths and reduces current concentration.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Loss of energy

If the coupling conductor has a frame shape, then radiation loss is reduced, but the structure becomes more complex

Engineering Contradiction:

Improveradiation lossVSAvoidcoupling conductor structure

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The coupling conductor is divided into multiple coupling portions (first, second, third, and fourth coupling portions) that extend in different directions. This segmentation distributes the eddy current paths across multiple segments, reducing the concentration of eddy currents in any single location and thereby reducing overall eddy current loss.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple coupling portions are integrated into a single coupling conductor structure that forms a frame shape. This merging of multiple conductive elements into one integrated structure provides both the complexity benefit (reduced radiation loss) and maintains manufacturing feasibility.

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 configuration suppresses concentrated eddy currents, reduces radiation loss, and improves the Q value, offering enhanced performance and noise shielding.

Implementation Method 1

an eddy current is generated in a concentrated manner in the coupling conductor due to a magnetic flux generated when a current flows

Methodology Applied

Scientific EffectEddy current: Eddy Currents

Implementation Method 2

the coupling conductor may be integrally provided with a plurality of the coupling portions, and may have a frame shape when viewed from the facing direction. In this configuration, the resonance space formed by the coupling conductor is completely closed. Therefore, in the electronic component, radiation from the resonance space is shielded by the coupling conductor

Methodology Applied

Scientific EffectRadiation shielding: Faraday Cage

Data Source

PatentUS20240313386A1Electronic component

Publication Date: 2024.09.19 TDK CORP

AI summary

An electronic component includes an element body having a pair of main surfaces facing each other, and a resonator disposed in the element body. The resonator has a first conductor and a second conductor disposed to face each other in a facing direction of the pair of main surfaces, and a coupling conductor extending in the facing direction and coupling the first conductor and the second conductor. A resonance space is formed by the first conductor, the second conductor, and the coupling conductor. The coupling conductor includes a plurality of coupling portions. At least a part of the plurality of coupling portions extends in one direction when viewed from the facing direction.