EM Metamaterial Sheet Structure for GHz Radiation Absorption
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Solution Overview
Problem
There is a limited set of naturally occurring electromagnetic (EM) control materials effective in centimeter waves or cmWave and millimeter waves or mmWave frequency ranges, necessitating the exploration of engineered EM metamaterials for multifunctionality in applications such as absorbers, beam steering, and antennas.
Innovation Solution
The development of EM metamaterial devices comprising an array of metallic resonant elements arranged in a non-random pattern on a dielectric carrier layer, oriented parallel to the layer's major plane, to control EM radiation within the 1 GHz to 100 GHz range, utilizing a transfer tool with pockets or through holes to secure the elements and enhance resonant properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If naturally occurring EM control materials are used, then material availability is limited, but material selection is restricted
Solution Approach 1:
The patent employs composite materials by combining metallic resonant elements (such as copper, aluminum, or steel) with a dielectric substrate material. This composite structure enables the material to exhibit electromagnetic metamaterial properties that neither component possesses alone, allowing control of EM radiation in cmWave and mmWave ranges while providing design flexibility through variable geometric parameters of the metallic elements.
2Adaptability or versatility
If EM metamaterials are engineered for multifunctionality, then material versatility is improved, but manufacturing complexity increases
Solution Approach 1:
The electromagnetic control article is segmented into distinct functional components: metallic resonant elements (which can be further divided into multiple patterns such as rings, squares, or irregular shapes) and a dielectric substrate. This segmentation allows each component to be optimized independently for its specific function while simplifying the manufacturing process, as the metallic elements can be fabricated using standard PCB techniques and then assembled onto the substrate.
Solution Approach 2:
The metallic resonant elements are designed with geometric parameters (size, shape, spacing, orientation) that can be adjusted to achieve multiple electromagnetic functions within a single structure. By varying these parameters, the same basic element design can provide absorption, reflection, or transmission control across different frequency ranges (cmWave and mmWave), eliminating the need for separate specialized materials for each function.
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 solution effectively absorbs EM radiation across the specified frequency range, demonstrating good noise suppression and frequency selectivity, as evidenced by return loss and insertion loss plots, thereby addressing the scarcity of effective EM control materials.
Implementation Method 1
a plurality of metallic resonant elements attached to an adhesive surface of the dielectric carrier layer to form an EM metamaterial structure
Implementation Method 2
The plurality of metallic resonant elements is oriented such that each metallic resonant element has an axis substantially parallel to each other and substantially parallel to a major plane of the dielectric carrier layer
Data Source
AI summary
Articles to control an electromagnetic (EM) radiation in the range of 1 GHz to 100 GHz, and methods of making and using the same are provided. An EM controlling sheet structure includes a dielectric carrier layer and an array of metallic resonant elements supported by the dielectric carrier layer to form an EM metamaterial structure in a non-random pattern. The metallic resonant elements are oriented such that each metallic resonant element has an axis substantially parallel to each other and substantially parallel to a major plane of the dielectric carrier layer.