Slit Electromagnetic Interference Suppression Body
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Solution Overview
Problem
Existing electromagnetic interference suppression bodies with high dielectric constants induce electric fields that couple noise sources and receivers, leading to increased radiated noise and ineffective interference suppression across a wide frequency range, especially when affixed to signal lines with projections and depressions.
Innovation Solution
A sheet-like electromagnetic interference suppression body made of flaky soft magnetic metal powder with a binding component, featuring a plurality of slits that reduce the effective dielectric constant in the in-plane direction to 500 or less, effectively dividing the electric field and suppressing noise coupling and radiated noise across a wide frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slits are formed in the electromagnetic interference suppression body to reduce coupling, then noise suppression effectiveness is improved, but device complexity increases
Solution Approach 1:
The electromagnetic interference suppression body is segmented by forming multiple slits that extend in the in-plane direction. These slits divide the continuous suppression body into multiple regions, reducing the effective dielectric constant and preventing electric field-induced coupling between noise sources and receivers. The segmentation maintains overall structural integrity while introducing functional divisions that suppress interference across wide frequency ranges.
2Object-affected harmful factors
If the electromagnetic interference suppression body is affixed on the signal line to remove conductive noise, then conductive noise removal is improved, but radiated noise increases
Solution Approach 1:
The effective dielectric constant of the electromagnetic interference suppression body is changed by forming slits that reduce it to 500 or less. This parameter change modifies the body's interaction with electromagnetic fields, allowing it to suppress conductive noise through its magnetic properties while minimizing electric field induction that would otherwise generate radiated noise.
3Reliability
If many slits are formed to reduce effective dielectric constant to 500 or less, then coupling suppression is improved, but manufacturing difficulty increases
Solution Approach 1:
The suppression body is segmented by forming multiple slits that extend parallel to each other in the in-plane direction. This segmentation approach achieves the target effective dielectric constant of 500 or less while using a regular, repeating pattern that simplifies manufacturing compared to irregular complex structures. The slits can be formed using standard cutting or molding techniques.
Solution Approach 2:
The geometry parameters of the slits (width, spacing, length) are optimized to achieve the target effective dielectric constant while considering manufacturing capabilities. By controlling these parameters, the design achieves coupling suppression effectiveness with a structure that can be manufactured using conventional processes.
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 slits in the electromagnetic interference suppression body significantly reduce noise coupling between noise sources and receivers, suppress common mode current induction, and minimize radiated noise, achieving effective electromagnetic interference suppression across a broad frequency range.
Implementation Method 1
When the slits are formed, the electric field is divided and thereby suppressing the aforementioned coupling caused by the electric field
Implementation Method 2
The aforementioned electromagnetic interference suppression body has a relatively high dielectric constant in an in-plane direction
Implementation Method 3
made by binding flaky soft magnetic metal powder with a binding component
Data Source
AI summary
A device is provided with a potential noise radiating source capable of radiating potential noise, a potential noise receiving portion capable of receiving the potential noise and an electromagnetic interference suppression body. The electromagnetic interference suppression body is made by binding flaky soft magnetic metal powder with a binding component and has a sheet-like shape. The electromagnetic interference suppression body is formed with a plurality of slits. The electromagnetic interference suppression body is provided to straddle the potential noise radiating source and the potential noise receiving portion.