High-Frequency Dielectric Attachment Layer Segmentation

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Solution Overview

Problem

Existing high-frequency dielectric attachments face a decrease in Q value due to the low relative permittivity of the adhesive layer, limiting their adjusting effect and causing difficulties in physical placement and fixation in limited spaces.

Innovation Solution

A high-frequency dielectric attachment is designed as a laminate with an insulating sheet layer, an adhesive layer, and a dielectric sheet layer, where the dielectric sheet layer has a smaller width than the adhesive and insulating sheet layers, and the adhesive layer projects beyond the dielectric sheet layer, allowing the dielectric sheet to be in direct contact with the object while the adhesive is spaced apart, thus avoiding the low Q value and permittivity issues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the adhesive layer is used to affix the dielectric sheet to the dielectric substrate, then fixation is achieved, but the low relative permittivity of the adhesive layer causes a decrease in Q value and limits the adjusting effect

Engineering Contradiction:

ImproveQ valueVSAvoidfixation capability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The attachment is segmented into three distinct layers: an insulating sheet layer, a dielectric sheet layer, and an adhesive layer. The dielectric sheet layer is positioned between the insulating sheet and the dielectric substrate, allowing it to directly influence the electromagnetic field and Q value, while the adhesive layer is confined to peripheral regions for fixation only, minimizing its negative impact on electrical performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different layers are assigned different functional qualities: the dielectric sheet layer provides high relative permittivity for frequency adjustment and Q value enhancement, the insulating sheet layer provides electrical isolation, and the adhesive layer provides mechanical fixation. Each layer is optimized for its specific function rather than requiring all layers to perform all functions.

Inventive Principle:

Principle #3Local quality

2Reliability

If the dielectric sheet layer has the same width as the adhesive layer, then coverage is maximized, but the adhesive layer interferes with the electromagnetic field and reduces Q value

Engineering Contradiction:

ImproveQ valueVSAvoidcoverage area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The attachment structure is segmented in the width direction, with the dielectric sheet layer having a smaller width than the adhesive layer. This segmentation allows the dielectric sheet to be positioned only where it is needed for electromagnetic field interaction, while the adhesive layer extends beyond to provide sufficient fixation area without interfering with the high-Q region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The dielectric sheet layer is localized to the central region where electromagnetic field interaction is most effective, while the adhesive layer is distributed to peripheral regions where fixation is needed but electromagnetic influence is minimal. This spatial differentiation of functions optimizes both Q value and fixation capability.

Inventive Principle:

Principle #3Local quality

3Length of stationary object

If a thin dielectric film is used for the dielectric sheet layer, then the attachment can be placed in limited spaces, but the adjusting effect is reduced

Engineering Contradiction:

ImprovethicknessVSAvoidadjusting effect

Core Design Contradiction:

Length of stationary objectVSReliability

Solution Approach 1:

The attachment uses a composite structure with multiple dielectric layers having different properties. The dielectric sheet layer is made from material with high relative permittivity (greater than 2.08, preferably greater than 3.0), which compensates for the reduced thickness by providing stronger electromagnetic field interaction per unit thickness, thereby maintaining adjusting effect in space-constrained applications.

Inventive Principle:

Principle #40Composite materials

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 enables a significant adjusting effect without being influenced by the adhesive's low Q value and permittivity, allowing for precise frequency adjustments and improved fixation in constrained spaces.

Implementation Method 1

the dielectric sheet layer is made from a dielectric material having a relative permittivity greater than 2.08, preferably a relative permittivity greater than 3.0

Methodology Applied

Scientific EffectDielectric permittivity: Dielectric Permittivity

Data Source

PatentUS8658267B2High-frequency dielectric attachment

Publication Date: 2014.02.25 MURATA MFG CO LTD

AI summary

This disclosure provides a high-frequency dielectric attachment capable of suppressing a decrease in Q value of a high frequency circuit and achieving a great adjusting effect. The high-frequency dielectric attachment is a laminate of an insulating sheet layer, adhesive layer, and a dielectric sheet layer. The insulating sheet layer forms an outermost layer of the laminate, and the adhesive layer and dielectric sheet layer are arranged in sequence below the insulating sheet layer. The width of the dielectric sheet layer is smaller than each of the width of the insulating sheet layer and the width of the adhesive layer. The adhesive layer projects beyond the dielectric sheet layer in the width direction.