Resonator Absorber Layout for Thin-Band Electromagnetic Shielding

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Solution Overview

Problem

Existing radio wave absorbing structures with impedance conversion layers face challenges due to large thickness, which affects their efficiency in shielding electromagnetic waves in specific frequency bands.

Innovation Solution

A radio wave absorbing element comprising a first and second resonator, a reference conductor, and a shielding conductor arranged in a specific configuration to effectively shield electromagnetic waves, where the reference conductor surrounds part of a connection line path that magnetically or capacitively connects the resonators, allowing for efficient wave absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an impedance conversion layer is added to the resonator element, then the radio wave absorption performance is improved, but the thickness of the structure increases

Engineering Contradiction:

Improveradio wave absorption performanceVSAvoidthickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent extracts and eliminates the impedance conversion layer from the traditional resonator element structure. Instead of adding an impedance conversion layer, the invention uses a simplified resonator element that directly achieves radio wave absorption through its resonant structure, thereby maintaining absorption performance while reducing thickness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the structural parameters of the resonator element by removing the impedance conversion layer and adjusting the resonator geometry. This parameter change allows the resonator to achieve effective radio wave absorption without requiring the additional thickness that would be needed for an impedance conversion layer.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If multiple resonators are arranged closely to improve shielding effectiveness, then the frequency band coverage is improved, but the structural complexity increases

Engineering Contradiction:

Improveshielding effectivenessVSAvoidstructural complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent divides the shielding structure into multiple identical resonator elements arranged in an array. Each resonator element is a simple, standardized component that can be easily manufactured and assembled. The segmentation into identical units achieves broad frequency band coverage through the collective effect of multiple elements while keeping individual element complexity low.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The resonator element is designed as a universal component that can serve multiple functions: it provides radio wave absorption, acts as a potential reference, and contributes to the overall shielding effectiveness. The reference conductor serves multiple purposes by providing potential reference for resonators and surrounding the connection line path. This multi-functionality reduces the need for additional specialized components, thereby reducing structural complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

The configuration enables effective shielding of electromagnetic waves within a predetermined frequency band, as demonstrated by the assembly's ability to attenuate waves in specific frequency ranges, such as 18.00 GHz to 28.00 GHz, without transmitting them.

Implementation Method 1

a third resonator located between the first resonator and the second resonator in the first direction and configured to magnetically or capacitively connect to or electrically connect to each of the first resonator and the second resonator

Methodology Applied

Scientific EffectMagnetic connection: Electromagnetic Induction

Implementation Method 2

Methodology Applied

Scientific EffectCapacitive connection: Capacitance

Implementation Method 3

a first resonator extending in a first plane direction, a second resonator spaced apart from the first resonator in a first direction and extending in the first plane direction

Methodology Applied

Scientific EffectResonance: Resonance

Implementation Method 4

electromagnetic waves in a predetermined frequency band can be shielded

Methodology Applied

Scientific EffectElectromagnetic absorption: Absorption (EM radiation)

Data Source

PatentUS20240195078A1Radio wave absorbing element and assembly

Publication Date: 2024.06.13 KYOCERA CORP

AI summary

A radio wave absorbing element includes a first resonator extending in a first plane direction, a second resonator spaced apart from the first resonator in a first direction and extending in the first plane direction, a third resonator located between the first resonator and the second resonator in the first direction and configured to magnetically or capacitively connect to or electrically connect to each of the first resonator and the second resonator, a reference conductor extending in the first plane direction, located between the first resonator and the second resonator in the first direction, and serving as a potential reference of the first resonator and the second resonator, and a shielding conductor spaced apart from the second resonator in the first direction and extending in the first plane direction.