3D Orthogonal-Loop Metamaterial for Wide-Angle EM Absorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wideband wave-absorbing materials face challenges with complex structures, difficulty in impedance matching, and poor wave-transparency, especially when incident angles change, limiting their effectiveness in absorbing electromagnetic waves across a large angle range.
Innovation Solution
A three-dimensional metamaterial structure comprising orthogonal loops with metal semi-rings and resistors on perpendicular dielectric substrates, allowing for adjustable parameters and positions to achieve wideband wave absorption across a large angle range, with electrolytes filling gaps between substrates for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If multi-layer two-dimensional structures are cascaded and superposed to achieve wideband wave absorption, then wideband wave absorption is implemented, but the structure becomes complex and impedance matching between layers becomes difficult
Solution Approach 1:
The patent transitions from traditional two-dimensional layered structures to a three-dimensional configuration by positioning absorptive elements at multiple heights above the ground plane. This vertical dimensionality allows achieving wideband absorption through spatial distribution rather than complex layer stacking, thereby reducing structural complexity while maintaining broadband performance
Solution Approach 2:
The absorptive structure is divided into multiple independent elements positioned at different heights, each contributing to different frequency ranges. This segmentation allows simpler individual elements to collectively achieve wideband absorption without requiring complex impedance matching between tightly coupled layers
2Duration of action of moving object
If multi-layer two-dimensional structures are superposed to achieve wideband wave absorption, then wideband absorption is implemented, but wave-transparent capability becomes poor and is limited to a very narrow frequency band
Solution Approach 1:
By introducing vertical spacing between absorptive elements and the ground plane, the structure creates frequency-selective transparency windows. This three-dimensional arrangement allows electromagnetic waves to pass through at certain frequencies while being absorbed at others, achieving both wideband absorption and frequency-selective transparency that cannot be realized with planar superposed structures
3Duration of action of moving object
If common wideband wave-absorbing material structures are used, then wideband wave absorption is implemented, but once incident angle changes, wave-absorbing effect greatly changes
Solution Approach 1:
The patent employs absorptive elements with specific geometric configurations and orientations that are optimized for different incident angles. By varying the local properties of individual elements (such as their shape, size, and orientation), the overall structure maintains effective absorption across a wide angular range while achieving wideband performance
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 structure ensures effective wideband wave absorption in a large angle range, with high absorption rates across common electromagnetic frequency bands, including X and Ku bands, while maintaining low impedance matching complexity and high wave-transparency.
Implementation Method 1
a metal sheet and the chip resistor can produce ohm loss by the magnetic field loop, the electromagnetic energy of the electromagnetic wave is converted into heat energy by loss
Implementation Method 2
effective wideband wave absorption in a large angle range, with high absorption rates across common electromagnetic frequency bands, including X and Ku bands
Data Source
Figure 1
Figure 2
Figure 3~4B
AI summary
The present invention discloses a absorbing metamaterial, including a plurality of metamaterial units that are periodically arranged, where the metamaterial unit includes: a first loop disposed on a first plane; and a second loop disposed on a second plane, where the first plane is perpendicular to the second plane, so that the first loop and the second loop are orthogonal. According to the foregoing technical solution in the present invention, wave absorption in a large angle range can be implemented while ensuring wideband wave absorption.