Resonance Unit Noise Suppression Device for GHz EMI
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Solution Overview
Problem
Conventional electromagnetic materials are ineffective in suppressing electromagnetic interference (EMI) and radio frequency interference (RFI) at high frequencies due to rapid permeability attenuation, particularly in high-speed signal transmission interfaces above GHz frequencies.
Innovation Solution
A noise suppression device comprising a metal plate connected to a resonance unit with resonators and resistors, which absorbs or dissipates noise energy when resonating, allowing for bidirectional noise absorption at both input and output ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If electromagnetic material is used to suppress EMI, then noise suppression capability is improved, but effectiveness deteriorates at high frequencies (GHz or above) due to permeability attenuation
Solution Approach 1:
The patent changes the operating principle from relying on electromagnetic material permeability to using resonance frequency matching. By adjusting the resonance frequency of the resonator structure to match the target noise frequency, the device achieves effective noise suppression at high frequencies where traditional electromagnetic materials fail due to permeability attenuation.
Solution Approach 2:
The patent uses a composite structure combining conductive materials (for resonators) with dielectric materials (for substrates and spacing). This composite approach creates a resonance-based noise suppression system that overcomes the limitations of single-material electromagnetic shielding at high frequencies.
2Device complexity
If conventional electromagnetic materials are used, then simple structure is maintained, but adaptability to different frequency bands deteriorates
Solution Approach 1:
The patent makes the noise suppression device adaptable to different frequency bands by allowing adjustment of resonator parameters (such as dimensions, shape, or configuration). This dynamic adjustability enables the same basic structure to target different noise frequencies without requiring complete redesign, achieving versatility while maintaining structural simplicity.
3Object-affected harmful factors
If resonance units with resistors are added to absorb noise energy, then noise suppression effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent merges the noise absorption function with the existing resonator structure by integrating resistors directly into the resonator design. This combination allows the resonator to both resonate at the target frequency and dissipate energy through the resistors, achieving enhanced noise suppression without adding separate absorption components.
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 device effectively suppresses noise across specific frequency bands, such as 2.46 GHz to 2.53 GHz, providing a superior noise suppression capability compared to traditional materials, with absorption rates exceeding 50% in targeted frequency ranges.
Implementation Method 1
when the resonance unit occurs resonant, a noise transmitted by the metal plate will be conducted to the resonance unit and suppressed by the resonance unit
Implementation Method 2
each of the resonators of the resonance unit is configured with at least one resistor, when the noise transmitted on the metal plate is conducted to the resonance unit, the energy of the noise will be absorbed or dissipated by the resistors of the resonance unit
Data Source
AI summary
The present invention provides a noise suppression device and equivalent circuit thereof. The noise suppression device comprises a metal plate and at least one first resonance unit. The first resonance unit comprises a plurality of first resonators. Each of the first resonators comprises a first metal segment and at least one first conductive connection segment, the first metal segment is connected to the first conductive connection segment. When the first resonance unit is configured on the metal plate, each of the first metal segments is electrically connected to the metal plate by the corresponding first conductive connection segment. When the resonance of the first resonator occurs, a noise transmitted on the metal plate can be conducted to the first resonator and suppressed by the first resonator.