Resonance Loop Shielding Material With Low Electromagnetic Reflection
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Solution Overview
Problem
Conventional electromagnetic wave shielding materials reflect electromagnetic waves, which can affect other devices and change antenna characteristics due to environmental permittivity, limiting their usage.
Innovation Solution
An electromagnetic wave shielding material comprising a substrate with magnetically coupled resonance loops forming an LC parallel resonance circuit, which converts electromagnetic wave energy into a magnetic field, suppressing reflection and re-radiation, and reducing the influence of environmental permittivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FSS elements are used to shield electromagnetic waves, then electromagnetic wave shielding is achieved, but reflected electromagnetic waves adversely affect other devices
Solution Approach 1:
The patent changes the operating principle from reflection-based shielding to resonance-based energy conversion. By designing resonance loops with specific inductance and capacitance values to resonate at the target frequency, the system converts electromagnetic wave energy into magnetic field energy through LC parallel resonance, eliminating harmful reflections while maintaining shielding effectiveness
Solution Approach 2:
The patent converts the harmful reflected electromagnetic waves into useful magnetic field energy. The resonance loops absorb the electromagnetic wave energy and convert it into a magnetic field through resonance, transforming what was previously a harmful reflection into a contained magnetic field that does not interfere with other devices
2Reliability
If FSS elements are attached to a wall, then electromagnetic wave shielding is achieved, but electric length of FSS elements changes due to wall permittivity, resulting in deterioration in antenna characteristics
Solution Approach 1:
The patent designs resonance loops with specific inductance L and capacitance C parameters that are calculated based on the target frequency and are independent of wall permittivity. The resonance frequency is determined by the formula f = 1/(2π√(LC)), where L and C are controlled by the loop geometry and capacitor configuration, not by the mounting surface properties
Solution Approach 2:
The resonance loop structure is designed to be universally applicable across different mounting environments. The electromagnetic wave-to-magnetic field conversion mechanism works consistently whether mounted on walls, ceilings, or other surfaces, as it depends on the intrinsic LC resonance properties rather than environmental permittivity
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 material effectively shields electromagnetic waves by converting all energy into a magnetic field, suppressing reflection, and allowing flexible usage across various environments without limiting factors.
Implementation Method 1
each of the resonance loops is configured to form an LC parallel resonance circuit and resonate at the specific frequency
Implementation Method 2
the plurality of resonance loops are arranged to be magnetically coupled to each other
Data Source
AI summary
An electromagnetic wave shielding material is provided that is configured to prevent a usage environment from being limited. The electromagnetic wave shielding material shields an electromagnetic wave having a frequency, and includes a substrate and a plurality of resonance loops disposed on the substrate. Moreover, the plurality of resonance loops are positioned on the substrate to be magnetically coupled to each other. Each of the resonance loops forms an LC parallel resonance circuit that resonates at the frequency of the electromagnetic wave.