Electromagnetic Wave Absorber Array for Broadband Interference
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Solution Overview
Problem
Current electromagnetic interference (EMI) solutions, such as metal coatings and low-frequency magnetic materials, are inadequate for next-generation communication systems as they fail to effectively absorb high-frequency electromagnetic waves and radiated interference within electronic component modules.
Innovation Solution
An electromagnetic wave absorber comprising a substrate with an array of magnetic material bodies, exploiting surface lattice resonance to absorb electromagnetic waves across multiple frequency bands, including high-frequency ranges beyond the characteristic frequency of the magnetic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic materials are used to absorb electromagnetic waves, then low-frequency electromagnetic waves can be absorbed, but high-frequency electromagnetic waves cannot be effectively absorbed
Solution Approach 1:
The patent divides the electromagnetic wave absorption function into multiple segments by creating an array of discrete magnetic material bodies with different sizes. Each magnetic material body absorbs electromagnetic waves at its characteristic frequency, and the collective array covers a broad frequency range from low to high frequencies, resolving the limitation of single-frequency absorption
Solution Approach 2:
The patent applies local quality by making each magnetic material body have different physical dimensions (sizes) corresponding to different frequency absorption characteristics. Smaller magnetic material bodies absorb higher frequency waves while larger ones absorb lower frequency waves, allowing the system to simultaneously handle multiple frequency bands through spatial differentiation
2Object-affected harmful factors
If metal layers are coated on the outer surface to reflect electromagnetic waves, then electromagnetic interference suppression is achieved, but radiated electromagnetic interference inside the module and high-order harmonics cannot be reduced
Solution Approach 1:
The patent converts the harmful radiated electromagnetic interference and high-order harmonics into beneficial absorbed energy by using magnetic material bodies strategically positioned to absorb these specific frequency components. Instead of reflecting all electromagnetic waves (which causes resonance and high-order harmonics), the magnetic material bodies selectively absorb harmful frequencies, transforming the interference problem into an energy dissipation solution
3Device complexity
If a single magnetic material is used for absorption, then the structure is simple, but multiple frequency bands cannot be absorbed simultaneously
Solution Approach 1:
The patent segments the absorption function across multiple magnetic material bodies of varying sizes arranged in an array. This segmentation allows a single absorber structure to handle multiple frequency bands simultaneously, as each segment (magnetic material body) targets a specific frequency range, achieving multi-frequency absorption without requiring complex composite materials
Solution Approach 2:
The patent transitions from a single-material approach to a multi-dimensional spatial arrangement of magnetic material bodies. By varying the sizes (dimensions) of individual magnetic material bodies within the array, the system achieves multi-frequency absorption capability while maintaining structural simplicity, effectively adding a dimensional parameter (size variation) to control frequency response
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 absorber effectively reduces electromagnetic interference in next-generation communication systems by absorbing electromagnetic waves across a broad frequency spectrum, including high-frequency bands, thereby enhancing the performance of electronic component modules.
Implementation Method 1
the plurality of magnetic material bodies are disposed on the substrate in an array, so that a surface lattice resonance effect occurs between adjacent magnetic material bodies
Implementation Method 2
the electromagnetic wave absorber has a plurality of electromagnetic wave absorption frequencies in addition to an electromagnetic wave characteristic frequency of the plurality of magnetic material bodies
Data Source
AI summary
An electromagnetic wave absorber including a substrate and a plurality of magnetic material bodies is provided. The plurality of magnetic material bodies are disposed on the substrate in an array, so that the electromagnetic wave absorber has a plurality of electromagnetic wave absorption frequencies in addition to an electromagnetic wave characteristic frequency of the plurality of magnetic material bodies. A ratio of one of the plurality of electromagnetic wave absorption frequencies to the electromagnetic wave characteristic frequency is greater than 1 and is less than or equal to 6.