Resonator Via Electrode Matrix Q-Factor

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing resonator designs face challenges in improving the Q-factor without increasing the size of the via electrode section, as larger via electrodes can lead to reduced distance between shielding conductors, causing electric walls and unnecessary coupling in multi-staged dielectric filters, which deteriorate the Q-factor.

Innovation Solution

A resonator design featuring a via electrode section surrounded by shielding conductors, with a strip line connected to the via electrode and input/output terminals connected to the shielding conductors, allowing current to diffuse and displacement currents to flow, improving the Q-factor without increasing the via electrode size. The via electrodes are arranged along curved lines to concentrate current, reducing the need for additional electrodes and minimizing metal usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the diameter of the via electrode is increased to lower current density, then the Q-factor can be improved, but the distance between the via electrode and the shielding conductor decreases, causing the Q-factor to lower

Engineering Contradiction:

ImproveQ-factorVSAvoiddistance between via electrode and shielding conductor

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The via electrode is divided into multiple via electrodes arranged in a matrix pattern, where each via electrode has a smaller diameter than a single large via electrode would require. This segmentation allows the current to be distributed across multiple smaller electrodes, maintaining low current density while preserving adequate distance from shielding conductors.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The via electrodes are arranged in a two-dimensional matrix pattern rather than using a single via electrode. This dimensional transition from one to multiple elements in a structured array allows optimization of both current density distribution and spatial relationship with shielding conductors.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If the diameter of the via electrode is increased, then current density can be lowered, but an electric wall occurs between multi-staged resonators, leading to deterioration of the Q-factor

Engineering Contradiction:

ImproveQ-factorVSAvoidelectric wall between resonators

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The via electrode structure is segmented into multiple smaller via electrodes arranged in a matrix, eliminating the need for a single large-diameter via electrode that would create electric walls between adjacent resonators in multi-staged configurations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each via electrode in the matrix has optimized local characteristics with smaller diameter, allowing current to be distributed across multiple locations. This local optimization prevents the formation of electric walls while maintaining effective current conduction paths.

Inventive Principle:

Principle #3Local quality

3Reliability

If the diameter of the via electrode is increased, then current density can be lowered, but the electrode pattern for power receiving or coupling adjustment must be disposed between the via electrode and shielding conductor, hindering magnetic field spread and causing deterioration of the Q-factor

Engineering Contradiction:

ImproveQ-factorVSAvoidelectrode pattern disposition

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The via electrode is segmented into multiple smaller via electrodes in a matrix arrangement, which provides sufficient space between individual via electrodes and shielding conductors for disposing coupling adjustment electrode patterns without hindering magnetic field spread.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The transition from a single via electrode to a matrix array creates additional spatial dimensions and intervals, allowing proper disposition of electrode patterns for power receiving and coupling adjustment while maintaining effective magnetic field distribution.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 design achieves an improved Q-factor of 380 or more without increasing the via electrode size, reducing manufacturing time and costs, while minimizing unnecessary coupling and maintaining a sparse electromagnetic field between electrodes.

Implementation Method 1

a displacement current flows also from the strip line toward the specific shielding conductor via the via electrode section (Faraday's law)

Methodology Applied

Scientific EffectElectromagnetic Induction: Electromagnetic Induction

Implementation Method 2

a displacement current flows also from the strip line toward the specific shielding conductor via the via electrode section (Faraday's law)

Methodology Applied

Scientific EffectFaraday's law: Electromagnetic Induction

Data Source

PatentUS11038251B2Resonator

Publication Date: 2021.06.15 SOSHIN ELECTRIC COMPANY LIMITED

AI summary

This resonator has a via electrode part that is formed in a dielectric substrate; a plurality of shielding conductors that are formed so as to surround the via electrode part in the dielectric substrate; and a strip line that is connected to the via electrode part in the dielectric substrate and opposed to at least the shielding conductors, wherein a first input/output terminal and a second input/output terminal are connected to one of the shielding conductors to which a short-circuit end of the via electrode part is connected.